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
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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
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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
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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
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(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
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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.
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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
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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
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Al-Shehbaz Basionym: Smelowskia holmgrenii Rollins Contr. Gray Herb. 171: 50. 1950 Treatment appears in FNA Volume 7. Treatment on page 414. Illustrator: Barbara
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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
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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
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bladderpod Basionym: Lesquerella mcvaughiana Rollins Contr. Gray Herb. 171: 44. 1950 Treatment appears in FNA Volume 7. Treatment on page 650. Mentioned on page
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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
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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
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disjunctive species, and is found only as local, small populations. Harvill, A. M. 1950. Diphyscium cumberlandianum, a pre-Pliocene relic with palaeotropical affinities
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Cypripedium guttatum has been reported from British Columbia (D. S. Correll 1950), apparently based on a single collection of C. parviflorum (M. G. Henry
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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
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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
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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
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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
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