Psilostrophe tagetina
Pittonia 2: 176. 1891.
Illustrated
Basionym: Riddellia tagetina Nuttall Trans. Amer. Philos. Soc., n. s. 7: 371. 1841 (as tagetinae)
Synonyms: Psilostrophe tagetina var. grandiflora (Rydberg) Heiser Psilostrophe tagetina var. lanata A. Nelson
Biennials or perennials (rarely flowering first-year), 10–30 (–60+) cm. Stems arachno-villous (gray to gray-green). Heads in ± loose to crowded, corymbiform arrays. Peduncles (3–) 12–20 (–40) mm. Involucres 4–8 mm. Rays 3–4 (–6); laminae (3–) 7–14+ mm, spreading in fruit. Disc-florets 6–9 (–12). Cypselae usually glabrous, sometimes hirtellous and/or glanddotted; pappi of (4–) 6–8 elliptic or lanceolate to lance-subulate scales 2–3+ mm. 2n = 32.
Phenology: Flowering (Apr–)May–Sep(–Dec).
Habitat: Desert scrub, grasslands, limestone soils, saline flats, sandy soils
Elevation: (300–)600–2400 m
Distribution
Ariz., N.Mex., Tex., Utah, Mexico (Chihuahua), Mexico (Coahuila)
Discussion
See comments under 6. Psilostrophe villosa.
Selected References
None.
Lower Taxa
None.
... more about "Psilostrophe tagetina"
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 +
staminate +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
corymbiform +
singly +
glomerulate +
cluster +
indeterminate +
Present +
surrounding +
cylindric;campanulate or obconic +
spreading +
alternate +
deltate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
tough +
thick +
absent +
connate +
persistent +
distinct +
falling +
unequal +
Pittonia +
1891 +
pistillate +
absent +
fertile +
3;4 +
epaleate +
convex;flat +
fibrous +
entire +
absent +
exalbuminous +
modifed +
1;2 +
Illustrated +
alternate +
branched +
arachno-villous +
2-branched +
papillate +
Psilostrophe tagetina +
Psilostrophe +
species +
cylindric +
shorter +
dilated +
equaling +