Flora of North America species comparison

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Tetradymia comosa

cotton thorn, hairy horsebrush
Habit Shrubs, 30–120 cm.
Stems

1–5+, erect (wandlike), unarmed, evenly pannose.
Leaves

primaries lance-linear, stiff, pungent, not spinose, 20–60 (× 2–5) mm, tomentose;

secondaries (seldom present) spatulate, 8–15 mm, tomentose.
Peduncles

3–8 mm.
Involucres

hemispheric, 8 mm.
Florets

5–9;

corollas yellow to brownish, 8–9 mm.
Phyllaries

5–6, oblanceolate.
Heads

3–6.
Cypselae

ca. 4 mm, copiously pilose (hairs 6–10 mm);

pappi 0.
2n

= 60.

Tetradymia comosa
Phenology Flowering spring–summer.
Habitat Mostly sandy sites, chaparral, coastal sage scrub, sagebrush scrub
Elevation 300–1500 m (1000–4900 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 631.
Parent taxa Asteraceae > tribe Senecioneae > Tetradymia
Sibling taxa
T. argyraea, T. axillaris, T. canescens, T. filifolia, T. glabrata, T. nuttallii, T. spinosa, T. stenolepis, T. tetrameres
Name authority A. Gray: Proc. Amer. Acad. Arts 12: 60. (1877)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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