Wyethia helenioides

(de Candolle) Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 353. 1840.

Basionym: Alarconia helenioides de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 537. 1836
Treatment appears in FNA Volume 21. Treatment on page 101. Mentioned on page 100.

Plants (15–)25–40(–60) cm. Basal leaves: blades (whitish to grayish) oblong-ovate to lance-elliptic, 18–38 cm, margins usually entire, sometimes serrulate or dentate (often undulate), faces densely tomentose to tomentulose (usually gland-dotted as well), glabrescent; cauline leaves (3–6) similar, smaller. Heads usually borne singly (–2+). Involucres hemispheric or broader, 35–60+ mm diam. Phyllaries 16–24, unequal, herbaceous, margins not ciliolate, faces tomentose; outer (30–)40–80+ mm (foliaceous, much surpassing the discs). Ray florets 13–21; laminae 20–35(–50) mm. Cypselae 12–15 mm, distally strigillose. 2n = 38.

Phenology: Flowering (Feb–)Mar–May.
Habitat: Grassy slopes, openings in woodlands
Elevation: 10 –1600(–2000) m


Wyethia helenioides grows in the Sierra Nevada foothills and west of the Central Valley, avoiding the fog belt.

Selected References


Lower Taxa

... more about "Wyethia helenioides"
William A. Weber +
(de Candolle) Nuttall +
Alarconia helenioides +
10 –1600(–2000) m +
Grassy slopes, openings in woodlands +
Flowering (Feb–)Mar–May. +
Trans. Amer. Philos. Soc., n. s. +
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 helenioides +
species +