Tetradymia canescens |
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gray horsebrush, grey horsebrush, spineless horsebrush |
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Habit | Shrubs, 10–80 cm. |
Stems | 1–5+, erect, unarmed, pannose but for floccose or glabrescent streaks. |
Leaves | primaries lanceolate to spatulate, 5–40 (× 2–6) mm, tomentose to sericeous; secondaries similar, smaller. |
Peduncles | 5–25 mm. |
Involucres | turbinate to cylindric, 6–12 mm. |
Florets | 4; corollas cream to bright yellow, 7–15 mm. |
Phyllaries | 4, oblong to lanceolate. |
Heads | 3–8. |
Cypselae | 3–5 mm, glabrous or hirsute; pappi of 100–150 bristles 6–11 mm. |
2n | = 60, 62, 90, 120. |
Tetradymia canescens |
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Phenology | Flowering spring–fall. |
Habitat | Sagebrush scrub, pinyon-juniper woodlands, yellow-pine forests |
Elevation | 400–3300 m (1300–10800 ft) |
Distribution |
AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; BC
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Source | FNA vol. 20, p. 630. |
Parent taxa | Asteraceae > tribe Senecioneae > Tetradymia |
Sibling taxa | |
Synonyms | T. inermis |
Name authority | de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 440. (1838) |
Web links |
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