Search results

American Crataegi. J. Arnold Arbor. 6: 5–128. Palmer, E. J. 1950. Crataegus. In: M. L. Fernald. 1950. Gray’s Manual of Botany, ed. 8. New York. Pp. 767–801

Trudy Bot. Inst. Akad. Nauk S.S.S.R., Ser. 1, Fl. Sist. Vyssh. Rast. 9: 33. 1950. Guy L. Nesom Etymology: Greek pseudo -, deceptively similar, and genus name

endangered endemic. Adamson, R. S. and H. M. L. Bolus. 1950. Aizoaceae. In: R. S. Adamson and T. M. Salter. 1950. Flora of the Cape Peninsula. Cape Town. Pp. 363–365

positions ± centered between opposing lateral edges. As noted by A. Cronquist (1950) for Psilocarphus, the wings or apices of pistillate paleae of Filagininae

Taxa Groutiella tomentosa, Groutiella tumidula Steere Bryologist 53: 145. 1950. Dale H. Vitt Etymology: For Abel Joel Grout, 1867 – 1947, American bryologist

on trying to determine whether or not Silene is monophyletic. Maguire, B. 1950. Studies in the Caryophyllaceae. IV. A synopsis of the North American species

genusEucommia Show Lower Taxa Eucommia ulmoides Oliver Hooker's Icon. Pl. 20: plate 1950. 1890. Michael A. Vincent Introduced Etymology: Greek eu, good or well, and

familyMyrsinaceae genusArdisia speciesArdisia crenata Sims Bot. Mag. 45: plate 1950. 1817 ,. John J. Pipoly III, Jon M. Ricketson Common names: Coral ardisi

Basionym: Lesquerella carinata Rollins Contr. Gray Herb. 171: 42, fig. 1E–H. 1950 Treatment appears in FNA Volume 7. Treatment on page 629. Mentioned on page

1, 2. 2001. Robert R. Ireland Jr. Etymology: For William Russel Buck, b. 1950, American bryologist, and Latin - ella, diminutive Treatment appears in FNA

menziesii var. menziesii (Mirbel) Franco Bol. Soc. Brot. ser. 2, 24: 74. 1950. Barney Lipscomb Common names: Douglas-fir Oregon-pine sapin de Douglas Illustrated

varietyPseudotsuga menziesii var. glauca (Mayr) Franco Bol. Soc. Brot. ser. 2, 24: 77. 1950. Barney Lipscomb Common names: Rocky Mountain Douglas-fir pino real colorado

genusPlatylomella Show Lower Taxa Platylomella lescurii A. L. Andrews Bryologist 53: 58. 1950. John A. Christy Endemic Etymology: Genus name Platyloma and Latin -ella

mountains. Species ca. 50 (15 species in the flora). BocherBöcher, T. W. 1950. Contributions to the flora and plant geography of west Greenland II. Meddel

Beitel Common names: Nodding club-moss Etymology: for R. T. Palhinha (1871–1950), a Portuguese botanist Treatment appears in FNA Volume 2. Plants on substrate

Walter S. Flory† Endemic Basionym: Cooperia jonesii Cory Field & Lab. 18: 45. 1950 Treatment appears in FNA Volume 26. Treatment on page 302. Mentioned on page

genusEucommia speciesEucommia ulmoides Oliver Hooker's Icon. Pl. 20: plate 1950. 1890. Michael A. Vincent Common names: Hardy rubber-tree IntroducedIllustrated

Lower Taxa Pseudogynoxys chenopodioides (Greenman) Cabrera Brittonia 7: 54. 1950. Theodore M. Barkley† Etymology: Greek pseudo - , false or resembling, and

speciesAllium aaseae Ownbey Res. Stud. State Coll. Wash. 18: 19, fig. 18. 1950. Dale W. McNeal Jr., T. D. Jacobsen IllustratedEndemic Treatment appears

struthiopteris var. pensylvanica (Willdenow) C. V. Morton Amer. Fern J. 40: 247. 1950. David M. Johnson Common names: Ostrich fern fougère-à-l'autruche IllustratedEndemic

genusEricameria speciesEricameria laricifolia (A. Gray) Shinners Field & Lab. 18: 27. 1950. Lowell E. Urbatsch, Loran C. Anderson, Roland P. Roberts, Kurt M. Neubig

J. B. Whittall et al. 2006; Nesom 2012h), sect. Simiolus (G. R. Campbell 1950; Nesom 2012i), and sect. Paradantha (N. S. Fraga 2012). A secondary radiation

the fruit. Other authors following this alignment included M. L. Fernald (1950), H. A. Gleason (1952, vol. 2), and P. Wilson (1934). After closer scrutiny

V. baldwinii Torrey and V. lindheimeri Engelmann & Gray” (L. H. Shinners 1950); V. vulturina Shinners (known only from the type collection) may be a product

Flamingo in Everglades National Park), Monroe County, Florida (D. S. Correll 1950; C. A. Luer 1972). The specimen, in New York, includes a partial inflorescence

76: 828-841. Soepadmo, E. 1972. Fagaceae. In: C. G. G. J. Van Steenis, ed. 1950+. Flora Malesiana.... Series I. Spermatophyta. 11+ vols. in parts. Djakarta

Paris etc. Vol. 16, part 1, pp. 235-471. Trelease, W. and T. G. Yuncker. 1950. The Piperaceae of Northern South America. 2 vols. Urbana. Peperomia, Piper

Pleianthae speciesAtriplex pleiantha W. A. Weber Madroño 10: 189, figs. 1, 2. 1950. Stanley L. Welsh Common names: Four-corners orach IllustratedEndemic Synonyms:

long-distance dispersal of their light cypsela-palea complexes (A. Cronquist 1950). Populations of these self-pollinating species can establish from one cypsela

Cotoneaster franchetii var. sternianus Turrill Bot. Mag. 167: plate 130. 1950 (as sterniana) Treatment appears in FNA Volume 9. Treatment on page 466.

Duravia speciesPolygonum heterosepalum M. Peck & Ownbey Madroño 10: 250. 1950. Mihai Costea, François J. Tardif, Harold R. Hinds† Common names: Dwarf desert

speciesCystopteris tennesseensis Shaver J. Tennessee Acad. Sci. 25(2): 107. 1950. Christopher H. Haufler, Robbin C. Moran, Michael D. Windham Common names:

Basionym: Haplopappus whitneyi var. discoideus J. T. Howell Leafl. W. Bot. 6: 84. 1950 (as Aplopappus) Synonyms: Haplopappus whitneyi subsp. discoideus (J. T. Howell)

Cichorieae genusTragopogon speciesTragopogon mirus Ownbey Amer. J. Bot. 37: 497. 1950. Pamela S. Soltis Common names: Remarkable goatsbeard IntroducedIllustrated

Hasseanthus blochmaniae subsp. insularis Moran Desert Pl. Life 22: 78, fig. 3. 1950 Treatment appears in FNA Volume 8. Treatment on page 194. Mentioned on page

Basionym: Artemisia globularia var. lutea Hultén Fl. Alaska Yukon 10: 1567. 1950 Synonyms: Artemisia flava Treatment appears in FNA Volume 19. Treatment on

genusTragopogon speciesTragopogon miscellus Ownbey Amer. J. Bot. 37: 498. 1950. Pamela S. Soltis Common names: Hybrid or Ownbey’s goatsbeard Moscow salsify

bladderpod Basionym: Lesquerella paysonii Rollins Contr. Gray Herb. 171: 44. 1950 Synonyms: Physaria paysonii (Rollins) O’Kane & Al-Shehbaz Treatment appears

Tanacetum potentilloides var. nitrophilum Cronquist Leafl. W. Bot. 6: 49. 1950 Synonyms: Vesicarpa potentilloides var. nitrophilum (Cronquist) Kartesz Treatment

Jersey. It is reportedly extirpated from the type locality (M. L. Fernald 1950). Another specimen from Cape Cod is typical of E. fallax except for some

sometimes been included in Moraceae (H. A. Gleason 1968); M. L. Fernald (1950) placed them in a separate family, Cannabinaceae. Cannabaceae are wind pollinated

genusAntennaria speciesAntennaria arcuata Cronquist Leafl. W. Bot. 6: 41. 1950. Randall J. Bayer Common names: Box or meadow pussytoes EndemicConservation

varietyHymenoxys richardsonii var. floribunda (A. Gray) K. F. Parker Madroño 10: 159. 1950. Mark W. Bierner Common names: Colorado rubberweed olivaceous bitterweed

Endemic Basionym: Cordylanthus tecopensis Munz & J. C. Roos Aliso 2: 233. 1950 Treatment appears in FNA Volume 17. Treatment on page 669. Mentioned on page

Luzula speciesLuzula groenlandica Böcher Meddelelser om Gronland 147: 18. 1950. Janice Coffey Swab Common names: Greenland wood rush Endemic Treatment appears

Tetragonostachys speciesSelaginella weatherbiana R. M. Tryon Amer. Fern J. 40: 69. 1950. Iván A. Valdespino Common names: Weatherby's spike-moss Endemic Treatment

genusPhysaria speciesPhysaria cordiformis Rollins Contr. Gray Herb. 171: 47. 1950. Steve L. O’Kane Jr. Common names: Wassuk Range bladderpod Synonyms: Lesquerella

speciesPlatylomella lescurii (Sullivant) A. L. Andrews Bryologist 53: 58. 1950. John A. Christy EndemicIllustrated Basionym: Hypnum lescurii Sullivant in

genusHymenoxys speciesHymenoxys bigelovii (A. Gray) K. F. Parker Madroño 10: 159. 1950. Mark W. Bierner Common names: Bigelow’s rubberweed Endemic Basionym: Actinella

speciesPohlia obtusifolia (Villars ex Bridel) L. F. Koch Leafl. W. Bot. 6: 20. 1950. A. Jonathan Shaw Basionym: Bryum obtusifolium Villars ex Bridel Muscol.

speciesHymenoxys brandegeei (Porter ex A. Gray) K. F. Parker Madroño 10: 159. 1950. Mark W. Bierner Common names: Brandegee’s rubberweed western bitterweed

Basionym: Lepidium montanum subsp. demissum C. L. Hitchcock Madroño 10: 157. 1950, Treatment appears in FNA Volume 7. Treatment on page 576. Mentioned on page

speciesHymenoxys grandiflora (Torrey & A. Gray) K. F. Parker Madroño 10: 159. 1950. Mark W. Bierner Common names: Graylocks rubberweed four-nerved daisy IllustratedEndemic

distinct (D. S. Correll 1950; C. L. Hitchcock et al. 1955–1969, vol. 5; J. A. Calder and R. L. Taylor 1968; E. Hultén 1941–1950, vol. 3) have been summarized

Setaria (Poaceae: Paniceae). Sida 18:1037-1047 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

(1973) considered Geocaulon as a species of Comandra, whereas M. L. Fernald (1950) recognized separate genera. The treatment here follows the most comprehensive

where it has been named Sedum atropurpureum N. S. Turczaninow (E. Hultén 1941–1950, vol. 5), and R. rosea seems to extend (although not verified by chromosome

College Station, Texas, U.S.A. 653 pp. Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

in varied descriptions. The genus has been called dioecious (M. L. Fernald 1950), subdioecious (H. A. Gleason and A. Cronquist 1991), and polygamous (Xia

393–412. Gaiser, L. O. 1950. Chromosome studies in Liatris. I. Spicatae and Pycnostachyae. Amer. J. Bot. 37: 122–135. Gaiser, L. O. 1950b. Chromosome studies

genusKallstroemia speciesKallstroemia perennans B. L. Turner Field & Lab. 18: 155. 1950. Duncan M. Porter Conservation concernEndemic Basionym: Kallstroemia hirsuta L

Eula’s aster Endemic Basionym: Aster eulae Shinners Field & Lab. 18: 35. 1950 Treatment appears in FNA Volume 20. Treatment on page 516. Mentioned on page

Hasseanthus blochmaniae subsp. brevifolius Moran Desert Pl. Life 22: 80, fig. 4. 1950 Synonyms: Dudleya blochmaniae subsp. brevifolia (Moran) Moran Treatment appears

brevissimus var. multiflorus Cronquist Res. Stud. State Coll. Wash. 18: 80. 1950. James D. Morefield Common names: Delta woolly marbles Endemic Treatment

and Allozyme Data. M.S. thesis. San Diego State University. Moran, R. V. 1950. Notes on Hasseanthus, I. Desert Pl. Life 22: 76–82. Moran, R. V. 1951b.

ed. 2. Edwin B. Smith, Fayetteville, Arkansas, U.S.A. 489 pp. Snyder, L.A. 1950. Morphological variability and hybrid development in Elymus glaucus. Amer

N.S., Que., Europe. Subspecies vestita was recognized by M. L. Fernald (1950) and A. E. Roland and E. C. Smith (1966) as Alchemilla minor Hudson, a misapplication

common example is Comandra richardsiana, which according to M. L. Fernald (1950) represents a western and northern extreme form with a corymbose inflorescence

thistle Endemic Basionym: Cirsium davisii Cronquist Leafl. W. Bot. 6: 46. 1950 Treatment appears in FNA Volume 19. Treatment on page 135. Mentioned on page

spergulinum var. pratense (S. Stokes) J. T. Howell Leafl. W. Bot. 6: 80. 1950. James L. Reveal Common names: Mountain meadow wild buckwheat Endemic Basionym:

speciesBerberis pinnata subspeciesBerberis pinnata subsp. insularis Munz Aliso 2: 230. 1950. Alan T. Whittemore Conservation concernEndemic Treatment appears in FNA

tolmiei var. persimile Ownbey Res. Stud. State Coll. Wash. 18: 29, fig. 13. 1950. Dale W. McNeal Jr., T. D. Jacobsen IllustratedEndemic Treatment appears

varietyRhynchospora globularis var. saxicola (Small) Kükenthal Bot. Jahrb. Syst. 75: 159. 1950. Robert Kral IllustratedEndemic Basionym: Rhynchospora saxicola Small Man

genusTetradymia speciesTetradymia argyraea Munz & J. C. Roos Aliso 2: 237. 1950. John L. Strother Endemic Treatment appears in FNA Volume 20. Treatment on

interpretation of somatic chromosomes (R. J. Moore and C. Frankton 1974). Arènes, J. 1950. Monographie du genre Arctium L. Bull. Jard. Bot. État Bruxelles 29: 67–156

been available, and the size of floral parts was taken from M. L. Fernald (1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"genus","name":"Amelanchier"

generally flowers at about the same time as Amelanchier laevis. M. L. Fernald (1950) and J. E. Cruise (1964) reported that it hybridizes with A. arborea, A.

Oklahoma Agric. Exp. Sta. Bull. B-673:1-37 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

Dendrophylax has been variously placed in Polyrrhiza Pfitzer (D. S. Correll 1950; C. A. Luer 1972) or Polyradicion Garay (L. A. Garay 1969). The type of Polyrrhiza

the Northwest Coast Indians. Ecol. Food Nutr. 13: 199–219. Turrill, W. B. 1950. Character combinations and distribution in the genus Fritillaria and allied

speciesNotholaena copelandii C. C. Hall Amer. Fern J. 40: 181, plate 16. 1950. Michael D. Windham Synonyms: Cheilanthes candida var. copelandii (C. C.

speciesArtemisia papposa S. F. Blake & Cronquist Leafl. W. Bot. 6: 43, plate 1. 1950. Leila M. Shultz Common names: Owyhee sage Endemic Treatment appears in FNA

varietySenecio integerrimus var. exaltatus (Nuttall) Cronquist Leafl. W. Bot. 6: 48. 1950. Theodore M. Barkley† IllustratedEndemic Basionym: Senecio exaltatus Nuttall

saw-wort Basionym: Saussurea viscida Hultén Fl. Alaska Yukon 10: 1627, fig. 6c. 1950 Treatment appears in FNA Volume 19. Treatment on page 167. Mentioned on page

Basionym: Senecio yukonensis A. E. Porsild Canad. Field-Naturalist 64: 44. 1950 Synonyms: Senecio alaskanus Hultén Treatment appears in FNA Volume 20. Treatment

genusTimmiella speciesTimmiella crassinervis (Hampe) L. F. Koch Leafl. W. Bot. 6: 11. 1950,. Richard H. Zander Basionym: Trichostomum crassinerve Hampe Linnaea 30:

Basionym: Thelesperma filifolium var. flavodiscum Shinners Field & Lab. 18: 98. 1950 Treatment appears in FNA Volume 21. Treatment on page 202. Mentioned on page

speciesSenecio sheldonensis A. E. Porsild Canad. Field-Naturalist 64: 43. 1950. Theodore M. Barkley† Endemic Treatment appears in FNA Volume 20. Treatment

Basionym: Astranthium integrifolium var. robustum Shinners Field & Lab. 18: 158. 1950 Treatment appears in FNA Volume 20. Treatment on page 204. Annuals, taprooted

var. longiareolata (Clover & Jotter) L. D. Benson Cacti Arizona ed. 2, 43. 1950. Donald J. Pinkava Common names: Grand Canyon beavertail pricklypear Endemic

speciesScleropodium cespitans (Müller Hal.) L. F. Koch Leafl. W. Bot. 6: 31. 1950. Michael S. Ignatov Basionym: Hypnum cespitans Müller Hal. Syn. Musc. Frond

genusPseudogynoxys speciesPseudogynoxys chenopodioides (Kunth) Cabrera Brittonia 7: 56. 1950. Theodore M. Barkley† IntroducedIllustrated Basionym: Senecio chenopodioides Kunth

var. wilcoxii (Toumey ex K. Schumann) W. T. Marshall Ariz. Cactuses, 100. 1950. Allan D. Zimmerman, Bruce D. Parfitt Common names: Wilcox’s fishhook cactus

Endemic Basionym: Opuntia nicholii L. D. Benson Cacti Arizona ed. 2, 48. 1950 Synonyms: Opuntia hystricina var. nicholii (L. D. Benson) Backe berg Treatment

grassland and chaparral communities, oak and pine woodlands Elevation: 100-1500(-1950) m Generated Map Legacy Map Calif. Variety pedunculatum is encountered infrequently

genusStylocline speciesStylocline sonorensis Wiggins Contr. Dudley Herb. 4: 26. 1950. James D. Morefield Common names: Sonoran or mesquite neststraw Treatment

varietySenecio integerrimus var. ochroleucus (A. Gray) Cronquist Leafl. W. Bot. 6: 48. 1950. Theodore M. Barkley† Endemic Basionym: Senecio lugens var. ochroleucus A

spergulinum var. reddingianum (M. E. Jones) J. T. Howell Leafl. W. Bot. 6: 79. 1950. James L. Reveal Common names: Redding’s wild buckwheat IllustratedEndemic

Panicum. Contr. U.S. Natl. Herb. 15:1-396 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

Portal 2010), Yukon (1200–1500 m), and nine counties in central Colorado (1950–3850 m). None. None. window.propertiesFromHigherTaxa=[{"rank":"species","name":"Viola

A. Gray et al. [1878–1897, vol. 1(2)], J. K. Small (1903), M. L. Fernald (1950), and L. Abrams and R. S. Ferris (1923–1960, vol. 4) considered Sericocarpus

Panicum. Contr. U.S. Natl. Herb. 15:1-396 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

and pharmacological activity. Pi. Med. (Stuttgart) 1985:212-214 Dore, W.G. 1950. Persian darnel in Canada. Sci. Agric. (Ottawa) 30:157-164 Soreng, R.J. and

Partheniastrum DC. (Asteraceae–Ambrosiinae). Phytologia 31: 463–482. Rollins, R. C. 1950. The guayule rubber plant and its relatives. Contr. Gray Herb. 172: 1–73

(Linnaeus) Allioni has been misidentified as S. rotundifolia (M. L. Fernald 1950), and as such, might be mistakenly attributed to S. minima. In North America

In the Eastern Hemisphere, the species is diploid, with 2n = 60 (I. Manton 1950). Several tetraploid counts have been reported from North America (W. H.

that spread northward into subtropical and temperate regions (M. L. Fernald 1950; H. A. Gleason and A. Cronquist 1991). If so, the species apparently spread

can be rooted, and in general this species is easy to grow. M. L. Fernald (1950) recognized forma corymbosa (de Candolle) Fernald with a corymb instead of

Al-Shehbaz Basionym: Smelowskia holmgrenii Rollins Contr. Gray Herb. 171: 50. 1950 Treatment appears in FNA Volume 7. Treatment on page 414. Illustrator: Barbara

Basionym: Haplopappus bloomeri var. ophitidis J. T. Howell Leafl. W. Bot. 6: 85. 1950 (as Aplopappus) Synonyms: Haplopappus ophitidis (J. T. Howell) D. D. Keck

stolonifera Moran Bull. S. Calif. Acad. Sci. 48: 105, plates 13, figs. b, c, 14–16. 1950 ,. Reid V. Moran Common names: Laguna Beach dudleya EndemicConservation concern

bladderpod Basionym: Lesquerella mcvaughiana Rollins Contr. Gray Herb. 171: 44. 1950 Treatment appears in FNA Volume 7. Treatment on page 650. Mentioned on page

survey in Idaho County, Idaho. Idaho Weed Control Rep. 1988:153 Femald, M.I. 1950. The North American variety of Milium effusum. Rhodora 52:218-222. Milium

locally established 35°–45° N latitude. The report from New York (M. L. Fernald 1950) is based on a misidentification of C. diandrus (R. S. Mitchell and G. C

disjunctive species, and is found only as local, small populations. Harvill, A. M. 1950. Diphyscium cumberlandianum, a pre-Pliocene relic with palaeotropical affinities

Cypripedium guttatum has been reported from British Columbia (D. S. Correll 1950), apparently based on a single collection of C. parviflorum (M. G. Henry

then, as with most similar fads, a sudden market collapse in 1637 (W. Blunt 1950; M. Dash 1999; F. A. Stafleu 1963). Botschantzeva, Z. P. 1982. Tulips: Taxonomy

work. Baker, C. A. 1951. Pontederiaceae. In: C. G. G. J. van Steenis, ed. 1950+. Flora Malesiana…. Series I. Spermatophyta. 11+ vols. in parts. Djakarta

and by B. L. Robinson and M. L. Fernald (1908) and M. L. Fernald (1950). Fernald (1950) also listed a second hybrid of very similar parentage and equally

have high levels of phenotypic plasticity (J. W. Gregor and J. M. S. Lang 1950), it usually has been accepted in a broad sense. That approach is followed

Boissier, and Cardiocrinum (Endicher) Lindley (H. D. Woodcock and W. T. Stearn 1950); many species now placed in these related genera have resided in Lilium

variable and was divided into three intergrading subspecies by E. Hultén (1941-1950, vol. 4) on basis of plant size, flower size, number of flowers, petal morphology

xanthochlora was recognized by P. A. Rydberg (1908–1918) and M. L. Fernald (1950) as A. pratensis attributed to F. W. Schmidt, as typical A. vulgaris Linnaeus

is maintained here pending corroboration from other studies. Beetle, A.A. 1950. Buffalograss-native of the shortgrass plains. Wyoming Agric. Exp. Sta. Bull

Las Cruces, New Mexico, U.S.A. 258 pp. Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

accuracy of some reported chromosome numbers, especially those published before 1950. There is also well-documented and extensive occurrence of polyploidy and

canadensis, A. humilis, A. interior, A. sanguinea, and A. spicata (M. L. Fernald 1950; L. Cinq-Mars 1971). J. E. Cruise (1964) documented hybrid swarms between

before sympatric congeners. The species has been reported (M. L. Fernald 1950) to hybridize with A. bartramiana, A. canadensis, A. humilis, and A. laevis

it frequently hybridizes with other members of the genus. M. L. Fernald (1950) and L. Cinq-Mars (1971) reported hybrids with A. arborea (A. ×quinti-martii

(1972–1996, vol. 2) included A. gaspensis in A. sanguinea. M. L. Fernald (1950) reported A. gaspensis from northern Maine; specimens from there assigned

(1974) treatment for the Alaskan varieties. E. Hultén's discussion (1941-1950, vol. 4, pp. 735-736) of local races and the variation within this species

canadensis, A. laevis, and A. spicata have been reported (M. L. Fernald 1950; P. Landry 1975). The authors have observed A. sanguinea flowering with A

College Station, Texas, U.S.A. 112 pp. Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

speciesCastilleja nivea Pennell & Ownbey Notul. Nat. Acad. Nat. Sci. Philadelphia 227: 2. 1950. J. Mark Egger, Peter F. Zika, Barbara L. Wilson, Richard E. Brainerd, Nick

collected along a roadside at Fort Saskatchewan, Alberta, in 1948, 1949, and 1950 (Turner 6416, ALTA, DAO; 7019, DAO; 7269, ALTA). Dianthus arenarius Linnaeus

its systematic significance. Int. J. Pl. Sci. 153: 258–272. Martin, F. L. 1950. Revision of Cercocarpus. Brittonia 7: 91–111. Rydberg, P. A. 1913. Cercocarpus

Agalinis (Scrophulariaceae) from the U.S.A. and Canada. Canad. J. Bot. 69: 1935–1950. Pennell, F. W. 1929. Agalinis and allies in North America: II. Proc. Acad

Wiegand’s early insights about the taxonomy of Amelanchier. M. L. Fernald (1950) considered A. wiegandii as suggesting a small-leaved A. laevis but with

as no specimens were seen to confirm its presence there. M. L. Fernald (1950) reported hybrids between Amelanchier humilis and A. arborea, A. bartramiana

of Phytolacca americana and P. rigida. Castanea 29: 155–164. Sauer, J. D. 1950. Pokeweed, an old American herb. Missouri Bot. Gard. Bull. 38: 82–88. Sauer

indicate conspecific status. In North America, authors such as M. L. Fernald (1950) and H. A. Gleason and A. Cronquist (1991) treated (in Matricaria) T. inodorum

more flowers per inflorescences, and longer and wider petals. M. L. Fernald (1950) and L. Cinq-Mars (1971) reported hybrids between Amelanchier spicata and

Elevation: 0-1700 m Generated Map Legacy Map Alaska, e Asia. E. Hultén (1941–1950, vol. 8) reported hybrids between Phyllodoce aleutica and P. caerulea from

sometimes been called P. inserta (for example, C. C. Deam 1940, M. L. Fernald 1950, H. J. Scoggan 1978–1979, J. S. Pringle 2010). According to the original

A&M University Press, College Station, Texas, U.S.A. 653 pp. Henrard, J. 1950. Monograph of the genus Digitaria. Universitaire Pers Leiden, Leiden, The

) Small (saw palmetto) in Florida. Econ. Bot. 52: 381--393. Hawkes, A. D. 1950. Notes on the palms 2. Saw palmetto Serenoa repens Small. Natl. Hort. Mag

stems, leaves, petioles, pedicels, and sepals (for example, M. L. Fernald 1950). Different variants often occur mixed in the same population and generally

Foothills between the Kings and San Joaquin rivers, Fresno County (R. Casamajor 1950). Rare in the wild, it has a long history of cultivation in both Europe and

grass" in California. Fremontia 4:25-27 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

around the filament hairs, allowing pollen to float to the stigma (O. Hagerup 1950; M. C. F. Proctor and P. F. Yeo 1972; M. C. F. Proctor et al. 1996). Such

(as B. odorata Bechstein) of Greenland and northern Europe (M. L. Fernald 1950), and it has been combined into that species (A. Löve and D. Löve 1966).

complex (Danthonieae, Poaceae). Telopea 7:269-274 Murphy, A.H. and R.M. Love. 1950. Hairy oatgrass, Danthonia pilosa R. Br., as a weedy range grass. Bull. Calif

several species have escaped and become marginally naturalized. M. L. Fernald (1950) reported that Deutzia gracilis and D. scabra were beginning to spread to

purshianus have been described erroneously as trigonous (e.g., M. L. Fernald 1950). Schoenoplectus purshianus is widely confused with S. smithii; they are

American Amelanchier taxa (K. M. Wiegand 1912; E. L. Nielsen 1939; M. L. Fernald 1950; J. E. Cruise 1964; L. Cinq-Mars 1971; S. M. McKay 1973; P. Landry 1975;

reported by H. A. Gleason and A. Cronquist (1991), and by M. L. Fernald (1950). Hybrids: Salix amygdaloides forms natural hybrids with S. gooddingii and

with two collections from Dade County in Florida by R. Woodbury in 1949 and 1950, but since Woodbury was involved at the time in establishing what later became

and Taxonomy of Tropical Flowering Plants. Calicut. Pp. 167–192. Lay, K. K. 1950. The American species of Triumfetta L. Ann. Missouri Bot. Gard. 37: 315–395

numbers among the Eurasian species (S. Kawano and H. H. Iltis 1963; E. Therman 1950, 1953, 1953b; M. N. Tamura 1993, 1995). In Polygonatum, filament morphology

be densely stipitate-glandular. L. H. Bailey (1941–1945), M. L. Fernald (1950), Y. Heslop-Harrison (1968), and H. A. Gleason and A. Cronquist (1991) distinguished

the genus commonly used horticulturally. H. E. McMinn (1949), P. A. Munz (1950), and M. G. Schmidt (1980) gave detailed discussions of horticultural considerations

error. Two or three leaf-color morphs are found in Serenoa (A. D. Hawkes 1950). The green type is more widespread, and the glaucous or blue-gray type seems

recognized within C. americanus, based on leaf shape and indumentum (M. L. Fernald 1950; H. A. Gleason and A. Cronquist 1991), but N. C. Coile (1988) provided evidence

regarded by some authors as a synonym or variety of T. variegata (D. S. Correll 1950; C. L. Withner 1980). Flower morphology helps little in the T. variegata

on matK sequences. Syst. Bot. 26:386-405 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

Spiranthes beckii Lindley and Ibidium beckii (Lindley) House. See D. S. Correll (1950) for a discussion. This species is easily recognized by its pure white flowers

Map Legacy Map Calif. Of conservation concern. P. A. Munz and J. C. Roos (1950) mistakenly believed that this coastal entity was the basis of Nolina parryi

(Canada, British Columbia, dry woods near Victoria, S. Flowers s. n., 1 Aug 1950, UC, WIU) has older foliage typical of the species, with all newer foliage

tropical deciduous forests and savannahs, at elevations of (450)600-1400(1950) m. One of its higher elevation populations appears to be the ancestor of

established in North America in Cavalier County, North Dakota, prior to 1910 (Dore 1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"genus","name":"Lolium"

best to follow the traditional treatment (M. L. Fernald 1950c; J. Rousseau and M. Raymond 1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"genus"

Va., Wash., W.Va., Wis., Wyo., Eurasia. The plant reported by M. Raymond (1950) as Carex hartmanii Cajander is most likely this species (J. Cayouette, pers

member of that flora. Early reports of the species in Ohio by M. L. Fernald (1950) and others have not been verified (T. S. Cooperrider 1995). Didiplis diandra

2005b) were influenced by the excellent work of C. L. Hitchcock (1936, 1945, 1950), who then had no idea about the genetic basis of such differences. A similar

Ontario. In Wisconsin, it was planted for erosion control at least as early as 1950. The Idaho record is from reseeded rangeland plots, and the Wyoming one from

Yukon, where the parent species frequently come into contact (E. Hultén 1941–1950, vol. 4; E. Lepage 1976). Betula ×dutillyi Lepage [= Betula glandulosa Michaux

Wash. 15: 211–232. Ownbey, M. 1950. The genus Allium in Idaho. Res. Stud. State Coll. Wash. 18: 3–39. Ownbey, M. 1950b. The genus Allium in Texas. Res

Reports of hybrids with S. discolor (C. K. Schneider 1921; M. L. Fernald 1950) are not based on convincing specimens, and synthetic hybrids could not be

likewise remains unresolved. The vouchers for the report by M. L. Fernald (1950) of Potentilla gracilis and P. pulcherrima from New Hampshire are presumably

crossing relationships are partly correlated with such variation (Snyder 1950, 1951; Stebbins 1957, Wilson et al. 2001). Rhizome development and the production

Carya (Juglandaceae) of North America. Brittonia 36: 140-153. Manning, W. E. 1950. A key to the hickories north of Virginia with notes on the two pignuts,

very spotty geographic range. It was reported from Montana by W. E. Booth (1950) and F. J. Hermann (1970); no verifying specimens have been found. Many authors

brainerdii has a scattered distribution and seems nowhere common. E. J. Palmer (1950) recorded it from North Carolina but this is well out of range. This species

identified as Spiranthes durangensis Ames & C. Schweinfurth (D. S. Correll 1950). They were subsequently placed in Deiregyne and described as D. confusa

just a casual waif. In Oregon, there are six collections (OSC, WTU) from 1950 to 2018 from three different counties, documenting a long-term presence.

that have been recognized at ranks ranging from forma to species (J. Arènes 1950). Some North American workers (e.g., R. J. Moore and C. Frankton 1974) have

Indies. Fissidens exilis, first reported for North America by W. C. Steere (1950), is probably inadvertently introduced from Europe. It can be distinguished

Cerastium tetrandrum) by J. A. Steyermark (1963) from Missouri and M. L. Fernald (1950) from Virginia are referable to C. pumilum and C. brachypetalum, respectively

Mikania scandens was reported as occurring in Ontario, Canada (M. L. Fernald 1950; J. A. Steyermark 1963); it has been deleted from the flora of Canada (H

its range, perhaps because of its rather inconspicuous habit (D. S. Correll 1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"genus","name":"Pteroglossaspis"

hairs and phyllaries only occasionally white. Some authors (A. E. Porsild 1950; E. H. Moss 1959; Porsild and W. J. Cody 1980) have recognized A. nitida

transplanted there. Delphinium alabamicum has not been seen in central Alabama since 1950; populations there might have been extirpated. None. None. window.proper

(A. Gray et al. 1878-1897, vol. 1(1,1), pp. 53-55) or forms (M. L. Fernald 1950) have been named. Specimens with extremely dissected leaves from Connecticut

in the South. It is difficult to grow in warmer climates. M. L. Fernald (1950) recognized forma breviscapa (Regel) Domin, found in the Canadian Maritime

900–2100 m Generated Map Legacy Map Calif. When P. A. Munz and J. C. Roos (1950) named Nolina parryi subsp. wolfii, a mountain woodland plant, the related

The circumscription of Euphrasia disjuncta follows that of E. Hultén (1941–1950, vol. 7, 1968) and P. D. Sell and P. F. Yeo (1970). According to the protologue

species does not appear to occur as far west (Iowa) as stated by M. L. Fernald (1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"genus","name":"Betula"

Cyperus pseudovegetus has been called “Cyperus vegetus Willd.” (M. L. Fernald 1950). The var. megalanthus Kükenthal of eastern Mexico and Central America recognized

stamen number is typically 11, but varies in some populations (W. H. Duncan 1950). Cuphea petiolata (Linnaeus) Koehne is an illegitimate name that pertains

Padgett and G. E. Crow 1993). The report from New Mexico by M. L. Fernald (1950) cannot be confirmed because no specimen is known. Putative hybrids with

of V. palustris occur in the middle third of the peduncle. E. Hultén (1941–1950, vol. 7, 1968) considered Viola palustris synonymous with V. epipsila var

(Jarbidge, Independent, and Kinsley mountains, where they occur as low as 1950 m) are plants that are smaller in all aspects and tend to have elliptic (rather

is rare and vulnerable. Most of its prime locations have disappeared since 1950 due to development. It is federally listed as endangered and worthy of managed

Yatskievych, pers. comm.). The report from New Hampshire is based on M. L. Fernald (1950). The stations on the Maine and Connecticut coasts, at Lake Champlain in

characteristics useful in distinguishing this species from H. occidentalis (W. S. Flory 1950) and from H. choctawensis (R. Gooch and G. L. Smith 1994; G. L. Smith and

Garden, New York, New York, U.S.A. 64 pp. Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

of the genus Antennaria. Proc. U.S. Natl. Mus. 23: 697–713. Porsild, A. E. 1950. The genus Antennaria in northwestern Canada. Canad. Field-Naturalist 64:

appear to be established there, the last collections having been made before 1950. In South America, it grows in moist, sandy soils near streams, lagoons,

edge of the eastern deciduous forest in the United States (M. L. Fernald 1950). None. None. window.propertiesFromHigherTaxa=[{"rank":"species","name":"Solidago

adjacent New York, and the St. Lawrence valley in Quebec. E. J. Palmer (1950) recorded the variety from Nova Scotia and, if so, it probably also occurs

Vt., Va., W.Va., Wis. Ionactis linariifolia was noted by M. L. Fernald (1950) to occur in “s. Minn.”; G. B. Ownbey and T. Morley (1991) did not include

comm. to L. Brouillet). Although previously treated as native (M. L. Fernald 1950; E. Hultén and M. Fries 1986), this status has been challenged (for example

localized, known from scattered populations on the edge of the Grand Canyon (1950–2300 m) in Coconino County, and in the Hack Canyon area (1300–1500 m) of

mysterious origin of maize. Econ. Bot. 55:492-514 Hitchcock, A.S. 1951 [title page 1950]. Manual of the Grasses of the United States, ed. 2, rev. A. Chase. U.S.D

given region can vary tremendously (for example, treatments in M. L. Fernald 1950 and H. A. Gleason and A. Cronquist 1991 for the northern half of the eastern

Hybrids with S. candida and S. eriocephala have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Salix pedicellaris × S. pellita

controversial. C. L. Hitchcock (1936) treated it as two varieties or (Hitchcock 1950) two subspecies of L. montanum, whereas R. C. Rollins (1993) treated it as

and Yukon as this species belong instead to R. sibiricus (E. Hultén 1941–1950, vol. 4). Those species, as well as R. subarcticus and R. hultenii Tzvelev

wootonii, and has more recently been discovered in Arizona, Cochise County, 1950–2130 m (Allen 27950, MO; Goodding 10822, MO). This is the most common species

transported outside the range of the parents by birds or mammals. M. L. Fernald (1950) misapplied the name Circaea canadensis Hill to plants now known to be hybrids

the widespread var. angustifolia), appearing in some floras (M. L. Fernald 1950; H. J. Scoggan 1978–1979; F. C. Seymour 1982), were distinguished based on

with S. discolor have been reported (C. K. Schneider 1921; M. L. Fernald 1950) but no convincing specimens have been seen. None. None. window.properti

bipinnatum adopted here includes not only T. huronense (see E. Hultén 1941–1950, vol. 10, 1968) but T. camphoratum and T. douglasii as well (see D. W. Kyhos

Reports of hybrids with S. humilis (C. K. Schneider 1921; M. L. Fernald 1950) are not based on convincing specimens. None. None. window.propertiesFro

of segregates based on this feature alone is not warranted (D. S. Correll 1950). Recent study, however, has shown Habenaria macroceratitis Wildenow to be

Rumex graminifolius was reported from Newfoundland also by M. L. Fernald (1950), but that record requires confirmation. Some plants from northeastern Eurasia

be among the earliest domesticated lilies (H. D. Woodcock and W. T. Stearn 1950), no doubt because it is handsome, easy to grow, and the bulbs are edible

Hispaniola is also unique and possibly due to a recent introduction. Prior to 1950, all major treatments of Epilobium attributed the name of E. coloratum to

turf on dry, peaty limestone barrens in Newfoundland (M. L. Fernald 1933, 1950) and as occasional upon humid rocks and coastal fens along Hudson Bay (J

A. Cronquist 1955, 1994; Fernald 1950; H. A. Gleason and A. Cronquist 1991; E. Hultén 1955, 1968; A. E. Porsild 1950b, 1957, 1964; A. E. Porsild and W

divided the species into 13 varieties and two forms, and later (Hitchcock 1950) further expanded its limits to include 15 subspecies and two varieties.

blades of their proximal leaves stellate-pubescent abaxially (M. L. Fernald 1950); such plants may be found in the flora and may merit taxonomic recognition

the other species of Psilocarphus; contrary to suggestions by A. Cronquist (1950), intermediates between the two are at most very uncommon. Psilocarphus berteri

Maine, Mich., Minn., Mont., N.H., N.Y., Vt., Wis., Eurasia. M. L. Fernald (1950) pointed out that North American plants sometimes segregated as Carex saltuensis

Thelesperma trifidum (Poiret) Britton has been misapplied (e.g., M. L. Fernald 1950) to T. filifolium. None. None. window.propertiesFromHigherTaxa=[{"rank":"genus"

plants from the northern Rockies as var. densa. According to E. Hultén (1941–1950, vol. 10), the only differences between var. densa and var. nuda are the

Okla., Tex. Regarding Vernona baldwinii and V. interior, L. H. Shinners (1950) wrote, “The tips of the phyllaries vary from loosely appressed to squarrose

his recognition of Diapensia obovata at subspecific rank, E. Hultén (1941–1950, vol. 8) wrote that “it seems to me to be a clear geographical race of D

and A. F. Tryon 1982). Species ca. 150–200 (9 in the flora). Fernald, M. L. 1950b. Adiantum capillus-veneris in the United States. Rhodora 52: 201--208. Paris

species in North America was apparently C. F. Reed (1970b). E. Hultén (1941–1950), B. C. Patten (1954), and S. A. Nichols (1975) proposed alternatively that

considered to be a synonym of S. aucuparia (Jones) or S. decora (M. L. Fernald 1950; H. A. Gleason and A. Cronquist 1991). However, Jones explicitly cited the

S. decora with a chromosome count of 2n = 68 (T. W. Böcher and K. Larsen 1950; K. Holmen in C. A. Jørgensen et al. 1958). Reliable S. decora chromosome

recognized in regional floras is E. obtusata (for example, M. L. Fernald 1950; T. S. Cooperrider 1995; G. Yatskievych 1999–2013, vol. 2). Authors have

verticillatum var. cheneyi solely on the presence of four stamens. M. L. Fernald (1950) considered var. cheneyi conspe­cific with M. hippuroides. Some specimens

authors such as E. L. Greene (1894b), H. M. Hall (1928), L. H. Shinners (1950b), A. Cronquist and D. D. Keck (1957), J. C. Semple (1974), and Hartman (1976

American floristic literature (e.g., C. K. Schneider 1921; M. L. Fernald 1950). They probably are introductions of long-standing brought to the New World

and S. nigra. Hybrids with S. serissima have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Attempts to hybridize S. lucida

Hybrids between Salix lucida and S. serissima have been reported (M. L. Fernald 1950); no convincing specimens have been seen. None. None. window.propertiesF

validly published and incorrectly attributed to Steyermark by M. L. Fernald 1950), have been described but are not recognized here. None. None. window.pr

cordifolia. Hybrids with S. eriocephala have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Inasmuch as S. eriocephala and

are closely related and are sometimes treated as conspecific (C. R. Ball 1950). Salix gooddingii has yellow-brown or pale gray-brown branches, capsules

pellita, and S. sericea. Hybrids with S. alba have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Controlled pollinations with

have been reported (the latter also by C. K. Schneider 1921; M. L. Fernald 1950) but no convincing specimens have been seen. Salix candida hybrids are recognized

characters. The achene and tubercle shape characters used by M. L. Fernald (1950) to distinguish E. uniglumis from E. halophila are not valid. In North America

A. Weber (1990). These last, also discussed at length by D. S. Correll (1950) under Habenaria sparsiflora var. laxiflora, are characterized by smaller

wendtii have been included incorrectly in M. ehrenbergii (D. S. Correll 1950; C. A. Luer 1975). The confusion among the taxa is discussed by T. K. Todsen

here; they have been usually accepted by recent workers (e.g., M. L. Fernald 1950; H. A. Gleason and A. Cronquist 1991). None. None. window.propertiesFrom

et al. 1972+, vol. 13), contrary to the view expressed by M. L. Fernald (1950). The name Potentilla procumbens Sibthorp was previously used for this species;

varieties were recognized (E. C. Ogden 19435) and treated (M. L. Fernald 1950). These varieties, Potamogeton gramineus var. gramineus, deletion}P. gramineus

fertility of its hybrids, and even some crosses within the species (Vilkomerson 1950). It may be derived from hybrids between E. canadensis (p. 303) and perhaps

(1980) suggested, that the taxon was derived from Acanthoscyphus. In the 1950s, G. J. Goodman (1904–1999) proposed its recognition at generic rank, using

Ownbey’s tragopogons: Forty years later. Amer. J. Bot. 78: 1586–1600. Ownbey, M. 1950c. Natural hybridization and amphiploidy in the genus Tragopogon. Amer. J

naturalized in Queensland, Australia, most likely from contaminated seed in the mid-1950s. Confusion in the identity of Froelichia species has been due in large part

(Diospyros virginiana) was reportedly made by Indians in the East (U.P. Hedrick 1950). The early colonists tried to make wine from the native grapes in eastern

introduced in Rancho Santa Ana Botanic Garden for biosystematic studies in the 1950s. It is abundant and weedy in the Garden and immediately adjacent in uncultivated

and Paraguay and naturalized elsewhere, was collected several times in the 1950s on ballast ore piles in the ports of Baltimore, Maryland, and Newport News

alopecuroidea has been established in the United States since at least the 1950s. None. None. window.propertiesFromHigherTaxa=[{"rank":"genus","name":"Acalypha"

growing in strawberry patches in Tangipahoa Parish, Louisiana, in the late 1950s. Despite efforts to eradicate it, the species persists there; it is not

or 6 (A. Cronquist and D. D. Keck 1957; R. L. Hartman 1990; L. H. Shinners 1950b; B. L. Turner 1987b; Turner and D. B. Horne 1964). Arida was recognized

Untersuchung der Familie Gramineen. Trudy Prikl. Bot., priloz. 44. Axelrod, D. I. 1950. Evolution of desert vegetation. Publ. Carnegie Inst. Wash. 590: 215--306

and S. nigra. Hybrids with S. petiolaris have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Salix alba × S. nigra is an

mechanisms. This appears in nearly all textbooks of evolution (G.L. Stebbins 1950), as well as plant speciation (V.Grant 1971, 1981). The minority of exceptions

Euphydryas (for example, P. R. Ehrlich et al. 1975) and Platyptilla (W. H. Lange 1950), and as nectar sources for hawkmoths (Hyles) (F. S. Crosswhite and C. D

Leeds, whose book Problems of Cytology and Evolution in the Pteridophyta (1950) aroused pteridologists around the world, led to numerous profound changes

Apalachicola River. Populations of Torreya taxifolia were thriving until the 1950s, but since then they have been decimated by fungal disease (R. L. Godfrey

from two collections made in South Carolina by W. B. Schofield in the late 1950s. However, the sites are now submerged by Lake Jocassee, and the species

in the United States, with the introduction of the cultivar 'Meyer' in the 1950s. It is the most cold-tolerant and coarsely textured of the three species

appears to be a reduced, more slender plant with 1–8 heads (M. L. Fernald 1950) from more northern parts of the range (Newfoundland and Labrador, northern

stems have been distinguished as var. labradorica (for example, M. L. Fernald 1950), but such plants typically are intermixed with hairy individuals. The Löves

also affect water availability and the location of this ecotone (E.L. Braun 1950). Finally, animal grazing and fire have clearly influenced the distribution

bebbiana, S. myricoides, and S. pedicellaris have been reported (M. L. Fernald 1950) but no convincing specimens have been seen. Controlled pollinations made

planifolia. Reports of hybrids with S. candida and S. eriocephala (M. L. Fernald 1950), and S. bebbiana and S. pyrifolia (C. K. Schneider 1921; Fernald), are not

“wool alien” in North America, was collected in South Carolina in the late 1950s (J. E. Dawson 1979). It is uncertain if it persists there. It occasionally

capillaris (p. 639). Escaped plants were collected at least as early as the 1950s, but were not recognized as belonging to A. castellana until the 1990s,

extinction rates in the United States increased during the period of 1800--1950. As noted earlier, about 90 plant species became extinct in North America

in head size (especially floret number). Chromosome counts (L. O. Gaiser 1950c) indicate that L. bracteata is hexaploid, compared to diploids and tetraploids

northwest India, apparently was introduced into the United States in the 1950s, first in Louisiana, and has spread mainly along the Gulf Coast. None. None

seen in San Mateo County, but their numbers have decreased greatly since the 1950s. None. None. window.propertiesFromHigherTaxa=[{"rank":"species","name":"Chorizanthe

is an Asian species that was introduced to the United States in the late 1950s for cultivation as a pasture grass. Various cultivars are now grown, mainly

into a new region, where the plants grow without cultivation (M.L. Fernald 1950, p. viii; G. H. M. Lawrence 1951, p.279). How many species have been transported

fascicled leaves. It was abundant and persisted for a number of years in the 1950s near Duck Lake and Bladworth in central Saskatchewan. None. None. window

all of the members of its species complex except E. gossypinum. Since the 1950s, the name consistently has been applied to plants with long, exserted stamens

modifications. The Engler and Prantl model remained the norm until the late 1950s when Cronquist and Takhtajan provided a series of innovative changes that

North America and eastern Mexico (A.Graham 1973; F.Miranda and A.J. Sharp 1950). It is well known that the broad-leaved deciduous forests of eastern North

and Prairie provinces as well) is included in the floras by M.L. Fernald (1950) and H.A. Gleason and A.Cronquist (1963). The former includes 4425 indigenous

York); Benjamin L. Robinson (1864--1935) and Merritt Lyndon Fernald (1873--1950) answered with the seventh edition of Gray's Manual in 1908 (New York, Cincinnati

ridge system is 900km long and 8 to 80 km wide. Elevation is from 750 to 1950m, and Mt. Mitchell (2326 m) is the highest point of eastern North America