Substances & Homeopatic Remedies

Wyethia helenoides

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wyethia helenioides



Traditional name

Poison Weed
     Syn.: Alarconia helenoides, Melarhiza inuloides
     English: California Compass Plant
     Wyethia helenoides

Used parts



Plantae; Spermatophyta, Angiospermae - Flowering Plants; Dicotyledonae; Asteridae / Synandrae; Asterales; Compositae / Asteraceae - Composites / Daisy or Sunflower Family


Original proving

Introduced and proved by Selfridge; Allen: Encyclop. Mat. Med., Vol. X, 168. Clarke: A Dictionary of Practical Mat. Med., Vol. III, 1569.

Description of the substance

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.
Flowering (Feb–)Mar–May. Grassy slopes, openings in woodlands; 10 –1600(–2000) m; Calif.
Wyethia helenioides grows in the Sierra Nevada foothills and west of the Central Valley, avoiding the fog belt.