Helianthella quinquenervis

(Hooker) A. Gray

Proc. Amer. Acad. Arts 19: 10. 1883.

Basionym: Helianthus quinquenervis Hooker London J. Bot. 6: 247. 1847
Treatment appears in FNA Volume 21. Treatment on page 116. Mentioned on page 115.

Plants (30–)50–150 cm. Cauline leaves: largest proximal to mid stems; blades usually 3– or 5–nerved, elliptic or ovate-lanceolate to lanceolate, 10–50 cm, faces sparsely hirsute or glabrous. Heads usually borne singly, ± nodding. Involucres hemispheric or broader, (25–)40–50 mm diam. Phyllaries (outer sometimes ± foliaceous) ovate to lanceolate (subequal to unequal, margins ciliate). Paleae scarious, relatively soft. Ray florets (13–)21; (corollas bright yellow) laminae 25–30(–40) mm. Disc corollas yellow. Cypselae strongly compressed, narrowly obovate (margins ciliate, faces strigose); pappi of 2 ± subulate scales plus 2–4+ shorter scales.


Phenology: Flowering Jun–Aug(–Oct).
Habitat: Moist meadows, aspen glades
Elevation: 1400–3600 m

Distribution

V21-279-distribution-map.gif

Ariz., Colo., Idaho, Mont., Nev., N.Mex., Oreg., S.Dak., Wyo., Mexico (Chihuahua, Nuevo León).

Discussion

Helianthella quinquenervis grows primarily in the Rocky Mountains, Great Basin ranges, and Black Hills.

Selected References

None.

Lower Taxa

None.
William A. Weber +
(Hooker) A. Gray +
Helianthus quinquenervis +
Ariz. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Wyo. +, Mexico (Chihuahua +  and Nuevo León). +
1400–3600 m +
Moist meadows, aspen glades +
Flowering Jun–Aug(–Oct). +
Proc. Amer. Acad. Arts +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Helianthella quinquenervis +
Helianthella +
species +