Psilostrophe villosa

Rydberg ex Britton

Man. Fl. N. States, 1006. 1901.

Endemic
Synonyms: Psilostrophe tagetina var. cerifera (A. Nelson) B. L. Turner
Treatment appears in FNA Volume 21. Treatment on page 455. Mentioned on page 454.

Biennials or perennials (rarely flowering first-year), 10–45 (–60+) cm. Stems arachno-villous (gray to gray-green). Heads in ± crowded, corymbiform arrays. Peduncles (0.5–) 1–3 (–5+) mm. Involucres 4–5 (–7) mm. Rays (2–) 3 (–5); laminae 3–4 (–6) mm, spreading in fruit. Disc-florets 5–8 (–12). Cypselae usually glabrous, sometimes glanddotted; pappi of 4–6 lanceolate to lance-subulate scales 2.5–3+ mm. 2n = 32.


Phenology: Flowering (Mar–)May–Aug(–Oct).
Habitat: Grasslands, limestone soils, gypseous soils, caliche
Elevation: 300–900 m

Distribution

V21-1144-distribution-map.gif

Kans., N.Mex., Okla., Tex.

Discussion

In trans-Pecos Texas, Psilostrophe villosa has been collected within 10 km or so of the Rio Grande; it probably occurs in Mexico. Within 100 km or so of the New Mexico-Texas border, P. villosa and P. tagetina intergrade; B. L. Turner et al. (1988) treated P. villosa as P. tagetina var. cerifera.

Selected References

None.

Lower Taxa

None.
... more about "Psilostrophe villosa"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Rydberg ex Britton +
decurrent +
compound +  and simple +
spatulate;oblanceolate or linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and orange +
obcompressed +, cylindric +  and clavate or obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Kans. +, N.Mex. +, Okla. +  and Tex. +
300–900 m +
strigillose +  and arachno-villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, limestone soils, gypseous soils, caliche +
glomerulate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cylindric;campanulate or obconic +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
sessile +  and petiolate +
cauline +, all +  and basal +
deltate +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Flowering (Mar–)May–Aug(–Oct). +
5 +  and 12 +
Man. Fl. N. States, +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
convex;flat +
4 +  and 6 +
lanceolate +  and lance-subulate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
erect +  and spreading +
arachno-villous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Psilostrophe tagetina var. cerifera +
Psilostrophe villosa +
Psilostrophe +
species +
cylindric +
dilated +
toothed +  and entire +
45 cm450 mm <br />0.45 m <br /> (60 cm600 mm <br />0.6 m <br />) +
perennial +  and biennial +
10 cm100 mm <br />0.1 m <br /> (45 cm450 mm <br />0.45 m <br />) +
shrub +  and subshrub +