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sectionPenstemon sect. Coerulei Show Lower Taxa Penstemon acuminatus, Penstemon angustifolius, Penstemon arenicola, Penstemon bracteatus, Penstemon buckleyi, Penstemon

Helianthinae genusHelianthus Show Lower Taxa Helianthus agrestis, Helianthus angustifolius, Helianthus annuus, Helianthus anomalus, Helianthus argophyllus, Helianthus

Phyllanthus abnormis, Phyllanthus acidus, Phyllanthus amarus, Phyllanthus angustifolius, Phyllanthus caroliniensis, Phyllanthus ericoides, Phyllanthus evanescens

speciesPenstemon angustifolius Show Lower Taxa Penstemon angustifolius var. angustifolius, Penstemon angustifolius var. caudatus, Penstemon angustifolius var. dulcis

Endemic Basionym: Asimina angustifolia A. Gray 1886 Synonyms: Pityothamnus angustifolius (A. Gray) Small Treatment appears in FNA Volume 3. Shrubs, 1-1.5(-1.75)

speciesHelianthus angustifolius Linnaeus Sp. Pl. 2: 906. 1753. Edward E. Schilling Common names: Swamp sunflower Endemic Synonyms: Helianthus angustifolius var. planifolius Fernald

Tracyanthus angustifolius (Michaux) Small Tracyanthus angustifolius var. texanus Bush Tracyanthus texanus (Michaux) S. Watson Zigadenus angustifolius A. Gray

A. Levin Novon 12: 60. 2002. Jackie M. Poole Basionym: Selinocarpus angustifolius Torrey in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 170, plate 47A. 1859

van Ee, Paul E. Berry WeedyEndemic Synonyms: Croton glandulosus var. angustifolius Müller Arg. C. glandulosus var. crenatifolius A. M. Ferguson C. glandulosus

Lars Hedenäs, Norton G. Miller† Illustrated Synonyms: Drepanocladus angustifolius (Hedenäs) Hedenäs & C. Rosborg Treatment appears in FNA Volume 28. Treatment

Macrorhynchus retrorsus Bentham Pl. Hartw., 320. 1849 Synonyms: Macrorhynchus angustifolius Kellogg Treatment appears in FNA Volume 19. Treatment on page 330. Mentioned

sectionPenstemon sect. Coerulei speciesPenstemon angustifolius varietyPenstemon angustifolius var. angustifolius Craig C. Freeman Endemic Treatment appears in

Penstemon sectionPenstemon sect. Coerulei speciesPenstemon angustifolius varietyPenstemon angustifolius var. venosus (D. D. Keck) N. H. Holmgren Brittonia 31:

Penstemon sectionPenstemon sect. Coerulei speciesPenstemon angustifolius varietyPenstemon angustifolius var. vernalensis N. H. Holmgren Brittonia 31: 229, fig

Penstemon sectionPenstemon sect. Coerulei speciesPenstemon angustifolius varietyPenstemon angustifolius var. dulcis Neese Great Basin Naturalist 46: 459. 1986

Penstemon sectionPenstemon sect. Coerulei speciesPenstemon angustifolius varietyPenstemon angustifolius var. caudatus (A. Heller) Rydberg Bull. Torrey Bot. Club

1906. Ronald W. Lance, Peter F. Zika Introduced Basionym: Cotoneaster angustifolius Franchet Pl. Delavay., 221. 1890 (as angustifolia) Treatment appears

LAYOUT:treatment:TUOYAL familyPhyllanthaceae genusPhyllanthus speciesPhyllanthus angustifolius (Swartz) Swartz Fl. Ind. Occid. 2: 1111. 1800. (as angustifolia) Geoffrey

Class-book Bot. ed. s.n.(b), 464. 1861 Synonyms: Senecio aureus var. angustifolius Britton Senecio earlei Small Senecio smallii Britton Treatment appears

columbianus (Koehne) Rehder P. helleri Rydberg P. insignis Carriére P. lewisii var. angustifolius (Rydberg) S. Y. Hu P. lewisii subsp. californicus (Bentham) Munz P. lewisii

names: Siberian or Siberian willow dock Synonyms: Rumex salicifolius var. angustifolius Meisner Treatment appears in FNA Volume 5. Treatment on page 513. Mentioned

flammula Linnaeus Alan T. Whittemore Synonyms: Ranunculus flammula var. angustifolius Treatment appears in FNA Volume 3. Stems erect to prostrate, 0.8-3 mm

Synonyms: Ranunculus oblongifolius Elliott Ranunculus pusillus var. angustifolius (Engelmann ex Engelmann & A. Gray) L. D. Benson Ranunculus tener Treatment

Senecio gibbonsii Greene Senecio saliens Rydberg Senecio triangularis var. angustifolius G. N. Jones Treatment appears in FNA Volume 20. Treatment on page 566

IllustratedEndemic Synonyms: Erigeron callianthemus Greene Erigeron peregrinus var. angustifolius (Greene) Cronquist Erigeron peregrinus subsp. callianthemus (Greene)

The later homonym Mimulus angustifolius (Greene) A. L. Grant 1925, not Hochstetter ex Richard 1850, based on Eunanus angustifolius, pertains here. None. None

names: Woodland sunflower Endemic Synonyms: Helianthus divaricatus var. angustifolius Kuntze Treatment appears in FNA Volume 21. Treatment on page 157. Mentioned

drummondii Nuttall Erysimum drummondii (A. Gray) Lunell Streptanthus angustifolius Turritis drummondii Treatment appears in FNA Volume 7. Mentioned on page

Map Ala., Fla., Ga., La., S.C. Helianthus simulans is similar to H. angustifolius, but much more robust with larger leaves, and to H. floridanus, but with

slightly bulging. It is closely related to two other tropical species, F. angustifolius Sullivant and F. yucatanensis Steere, both of which have limbate leaves

as an endangered species. It has been suggested to be a hybrid of H. angustifolius and H. eggertii or H. grosseserratus; no supporting evidence has been

C., S.C. Helianthus floridanus is similar to and intergrades with H. angustifolius, which has narrower leaves, and H. simulans, which is more robust and

var. angustifolium (Wiegand) G. L. Nesom (syn. A. lateriflorus var. angustifolius Wiegand); var. flagellare (Shinners) G. L. Nesom (syn. A. lateriflorus