Sphaeromeria cana

(D. C. Eaton) A. Heller

Muhlenbergia 1: 7. 1900.

Common names: Gray chickensage
IllustratedEndemic
Basionym: Tanacetum canum D. C. Eaton in S. Watson, Botany (Fortieth Parallel), 179, plate 19, figs. 8–14. 1871
Treatment appears in FNA Volume 19. Treatment on page 500. Mentioned on page 499.

Subshrubs (flowering twigs dying back each year), (5–)15–60 cm (aromatic). Stems erect, sericeous-canescent. Leaves mostly cauline; blades (linear or linear-oblanceolate, 10–40 mm) entire or pinnately or subpalmately lobed, faces ± sericeous. Heads usually 3–12 in compact, corymbiform cymes (1–3 cm across), sometimes 1–2. Involucres 2.5–4(–6) mm. Phyllaries 10–12, canescent. (Disc corollas ochroleucous, lobes villous.) Cypselae 1.8–1.9 mm (apices with irregular, thickened rims, faces glabrous or slightly gland-dotted). 2n = 18.


Phenology: Flowering Jul–Sep.
Habitat: Crevices in cliffs, dry rocky slopes
Elevation: 1800–4000 m

Discussion

Sphaeromeria cana grows in western United States, with northern extension in the Steens Mountains of Oregon.

Selected References

None.

Lower Taxa

None.