Flora of North America species comparison

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Psilostrophe cooperi

Cooper's paper daisy, paper flower, whitestem paperflower
Habit Shrubs or subshrubs, (15–)25–30(–50+) cm.
Stems

pannose (white).
Peduncles

35–60(–80+) mm.
Involucres

6–8 mm.
Disc florets

(6–)10–17(–25).
Heads

borne singly.
Cypselae

usually glabrous, sometimes gland-dotted;

pappi of 4–6 oblong to ± lanceolate scales 2–2.5 mm.
Rays

3–6;

laminae (8–)12–20 mm, spreading to reflexed in fruit.
2n

= 32.

Psilostrophe cooperi
Phenology Flowering (Feb–)Apr–Jun(–Dec).
Habitat Creosote-bush scrub, sandy washes
Elevation 100–2100 m (300–6900 ft)
Distribution
from FNA
AZ; CA; NV; UT; Mexico (Baja California, Sonora)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 454.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe
Sibling taxa
P. bakeri, P. gnaphalodes, P. sparsiflora, P. tagetina, P. villosa
Synonyms Riddellia cooperi
Name authority (A. Gray) Greene: Pittonia 2: 176. (1891)
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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