Wyethia helianthoides


J. Acad. Nat. Sci. Philadelphia 7: 40, plate 5. 1834.

Treatment appears in FNA Volume 21. Treatment on page 103. Mentioned on page 100, 101.
Revision as of 21:10, 5 November 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Plants 25–40(–80) cm. Basal leaves: blades (light green) lance-elliptic to elliptic-ovate, (10–)20–30+ cm, margins usually entire, sometimes denticulate, ± ciliolate, faces sparsely pilose to pilosulous (usually minutely gland-dotted or stipitate-glandular as well); cauline leaves similar, smaller distally (petiolate or sessile). Heads borne singly. Involucres ± hemispheric, (12–)20–30(–40) mm diam. Phyllaries 36–48, subequal, herbaceous, margins villous-ciliate, faces glabrous or glabrate; outer 18–25 mm (not surpassing discs). Ray florets 13–25; laminae (cream to white) 25–45 mm. Cypselae 9–11 mm, strigillose distally and on margins.

Phenology: Flowering May–Jul.
Habitat: Meadows, other damp to wet sites, openings in pine forests
Elevation: 40–2600 m



Idaho, Mont., Nev., Oreg., Wyo.


Hybrids between Wyethia helianthoides and W. amplexicaulis are infrequent where the species are in contact; no introgression has been noted. The hybrids have been called Wyethia ×cusickii Piper; they usually bloom later than W. helianthoides and earlier than W. amplexicaulis.

Selected References


Lower Taxa

... more about "Wyethia helianthoides"
William A. Weber +
Nuttall +
Idaho +, Mont. +, Nev. +, Oreg. +  and Wyo. +
40–2600 m +
Meadows, other damp to wet sites, openings in pine forests +
Flowering May–Jul. +
J. Acad. Nat. Sci. Philadelphia +
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 +
Wyethia helianthoides +
species +