Sphaeromeria potentilloides
Muhlenbergia 1: 7. 1900.
Common names: Fivefinger chickensage cinquefoil false sagebrush
IllustratedEndemic
Basionym: Artemisia potentilloides A. Gray Proc. Amer. Acad. Arts 6: 551. 1866
Synonyms: Tanacetum potentilloides (A. Gray) A. Gray Vesicarpa potentilloides (A. Gray) Rydberg
Revision as of 18:20, 6 November 2020 by RevisionBot (talk | contribs) (Bot: Adding category Revised Since Print)
Perennials, 3–30 cm. Stems lax. Leaves basal and cauline; basal (20–70 mm) 2-pinnately lobed (ultimate lobes linear to filiform, ca. 1 mm wide); cauline (5–18 mm) usually pinnately lobed, faces silky-tomentose. Heads 2–20 in corymbiform to paniculiform arrays or borne singly. Involucres 2.3–5.2 mm. Phyllaries 8–10, hairy. (Receptacles villous, hairs white, curly, 0.5–1 mm.) Cypselae 0.8–1.5 mm (faces obscurely nerved, becoming mucilaginous when wet).
Distribution
Calif., Idaho, Nev., Oreg.
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Heads (3–)4–20; involucres 3–4(–4.5) mm; basal leaves 2-pinnately lobed | Sphaeromeria potentilloides var. potentilloides |
| 1 | Heads 1–3(–4); involucres 4–5.1 mm; basal leaves 1-pinnately lobed | Sphaeromeria potentilloides var. nitrophila |