Psilostrophe cooperi
Pittonia 2: 176. 1891.
Basionym: Riddellia cooperi A. Gray Proc. Amer. Acad. Arts 7: 358. 1868
Revision as of 21:41, 29 July 2020 by imported>Volume Importer
Shrubs or subshrubs, (15–) 25–30 (–50+) cm. Stems pannose (white). Heads borne singly. Peduncles 35–60 (–80+) mm. Involucres 6–8 mm. Rays 3–6; laminae (8–) 12–20 mm, spreading to reflexed in fruit. Disc-florets (6–) 10–17 (–25). Cypselae usually glabrous, sometimes glanddotted; pappi of 4–6 oblong to ± lanceolate scales 2–2.5 mm. 2n = 32.
Phenology: Flowering (Feb–)Apr–Jun(–Dec).
Habitat: Creosote-bush scrub, sandy washes
Elevation: 100–2100 m
Distribution
Ariz., Calif., Nev., Utah, Mexico (Baja California), Mexico (Sonora)
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Psilostrophe cooperi"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
corymbiform +
continuous +
decurrent +
spatulate;oblanceolate or linear +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
35;150 +
absent +
zygomorphic +
monomorphic +
striate-ribbed +
dimorphic +
glabrous +
staminate +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
corymbiform +
singly +
glomerulate +
singly +
indeterminate +
surrounding +
cylindric;campanulate or obconic +
alternate +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
Pittonia +
1891 +
pistillate +
absent +
fertile +
3;6 +
epaleate +
convex;flat +
fibrous +
entire +
absent +
exalbuminous +
modifed +
1;2 +
alternate +
branched +
pannose +
2-branched +
papillate +
Psilostrophe cooperi +
Psilostrophe +
species +
cylindric +
shorter +
dilated +
equaling +