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greenstem paperflower

woolly paperflower

Habit Biennials or perennials (rarely flowering first year), 10–40+ cm. Biennials or perennials (rarely flowering first year), 10–45(–60+) cm.
Stems

± strigillose (greenish, sometimes ± villous in proximal axils).

arachno-villous (gray to gray-green).

Peduncles

8–12(–25+) mm.

(0.5–)1–3(–5+) mm.

Involucres

4–6 mm.

4–5(–7) mm.

Ray florets

(1–)2–3(–4);

corolla laminae (6–)8–10+ mm, reflexed in fruit.

Disc florets

7–9.

5–8(–12).

Heads

in ± corymbiform arrays.

in ± crowded, corymbiform arrays.

Cypselae

usually glabrous, sometimes gland-dotted;

pappi of 4–5 lanceolate to lance-subulate scales 2–3 mm.

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.

= 32.

Psilostrophe sparsiflora

Psilostrophe villosa

Phenology Flowering May–Sep. Flowering (Mar–)May–Aug(–Oct).
Habitat Grasslands, pinyon-juniper scrub, sagebrush scrub, yellow pine forests Grasslands, limestone soils, gypseous soils, caliche
Elevation 900–2200 m (3000–7200 ft) 300–900 m (1000–3000 ft)
Distribution
from FNA
AZ; NM; UT
[WildflowerSearch map]
[BONAP county map]
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. 454. FNA vol. 21, p. 455.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Psilostrophe
Sibling taxa
P. bakeri, P. cooperi, P. gnaphalodes, P. tagetina, P. villosa
P. bakeri, P. cooperi, P. gnaphalodes, P. sparsiflora, P. tagetina
Synonyms Riddellia tagetina var. sparsiflora P. tagetina var. cerifera
Name authority (A. Gray) A. Nelson: Proc. Biol. Soc. Wash. 16: 23. (1903) Rydberg ex Britton: Man. Fl. N. States, 1006. (1901)
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