Flora of North America species comparison

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Psilostrophe villosa

woolly paperflower
Habit Biennials or perennials (rarely flowering first year), 10–45(–60+) cm.
Stems

arachno-villous (gray to gray-green).
Peduncles

(0.5–)1–3(–5+) mm.
Involucres

4–5(–7) mm.
Disc florets

5–8(–12).
Heads

in ± crowded, corymbiform arrays.
Cypselae

usually glabrous, sometimes gland-dotted;

pappi of 4–6 lanceolate to lance-subulate scales 2.5–3+ mm.
Rays

(2–)3(–5);

laminae 3–4(–6) mm, spreading in fruit.
2n

= 32.

Psilostrophe villosa
Phenology Flowering (Mar–)May–Aug(–Oct).
Habitat Grasslands, limestone soils, gypseous soils, caliche
Elevation 300–900 m (1000–3000 ft)
Distribution
from FNA
KS; NM; OK; TX
[WildflowerSearch map]
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 455.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe
Sibling taxa
P. bakeri, P. cooperi, P. gnaphalodes, P. sparsiflora, P. tagetina
Synonyms P. tagetina var. cerifera
Name authority Rydberg ex Britton: Man. Fl. N. States, 1006. (1901)
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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