Psilostrophe tagetina

(Nuttall) Greene

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
Treatment appears in FNA Volume 21. Treatment on page 455. Mentioned on page 454.

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

V21-1143-distribution-map.gif

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"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
(Nuttall) Greene +
decurrent +
Riddellia tagetina +
compound +  and simple +
spatulate;oblanceolate or linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
yellow +  and orange +
hirtellous +  and glabrous +
obcompressed +, cylindric +  and clavate or obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Tex. +, Utah +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
(300–)600–2400 m +
strigillose +  and arachno-villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Desert scrub, grasslands, limestone soils, saline flats, sandy soils +
glomerulate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
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 /> (0.8 cm8 mm <br />0.008 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 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 +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering (Apr–)May–Sep(–Dec). +
5 +  and 12 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
convex;flat +
6 +  and 8 +
lanceolate +  and lance-subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
Illustrated +
erect +  and spreading +
arachno-villous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Psilostrophe tagetina var. grandiflora +  and Psilostrophe tagetina var. lanata +
Psilostrophe tagetina +
Psilostrophe +
species +
cylindric +
dilated +
toothed +  and entire +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
perennial +  and biennial +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
shrub +  and subshrub +