Sphaeromeria potentilloides

(A. Gray) A. Heller

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
Treatment appears in FNA Volume 19. Treatment on page 500. Mentioned on page 499.

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).

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

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
Timothy K. Lowrey +  and Leila M. Shultz +
(A. Gray) A. Heller +
Artemisia potentilloides +
Fivefinger chickensage +  and cinquefoil false sagebrush +
Calif. +, Idaho +, Nev. +  and Oreg. +
Muhlenbergia +
Illustrated +  and Endemic +
Tanacetum potentilloides +  and Vesicarpa potentilloides +
Sphaeromeria potentilloides +
Sphaeromeria +
species +