Psilostrophe villosa |
Psilostrophe bakeri |
|
---|---|---|
woolly paperflower |
Baker's paperflower |
|
Habit | Biennials or perennials (rarely flowering first year), 10–45(–60+) cm. | Biennials or perennials (rarely flowering first year), 5–12(–20+) cm. |
Stems | arachno-villous (gray to gray-green). |
arachno-villous (gray to gray-green). |
Peduncles | (0.5–)1–3(–5+) mm. |
15–35(–50) mm. |
Involucres | 4–5(–7) mm. |
7–9(–12) mm. |
Disc florets | 5–8(–12). |
(10–)12–15(–20). |
Heads | in ± crowded, corymbiform arrays. |
in ± loose, corymbiform arrays. |
Cypselae | usually glabrous, sometimes gland-dotted; pappi of 4–6 lanceolate to lance-subulate scales 2.5–3+ mm. |
usually glabrous, sometimes gland-dotted; pappi of 4–5 ± oblong scales 1.5–2 mm. |
Rays | (2–)3(–5); laminae 3–4(–6) mm, spreading in fruit. |
4–5(–8); laminae 8–15+ mm, spreading in fruit. |
2n | = 32. |
= 32. |
Psilostrophe villosa |
Psilostrophe bakeri |
|
Phenology | Flowering (Mar–)May–Aug(–Oct). | Flowering May–Jun. |
Habitat | Grasslands, limestone soils, gypseous soils, caliche | Rocky, often alkaline, slopes, knolls |
Elevation | 300–900 m (1000–3000 ft) | 1300–2000 m (4300–6600 ft) |
Distribution |
KS; NM; OK; TX
|
CO; ID
|
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. | FNA vol. 21, p. 455. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe |
Sibling taxa | ||
Synonyms | P. tagetina var. cerifera | |
Name authority | Rydberg ex Britton: Man. Fl. N. States, 1006. (1901) | Greene: Pl. Baker. 3: 29. (1901) |
Web links |