Psilostrophe tagetina

(Nuttall) Greene

Pittonia 2: 176. 1891.

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 gland-dotted; 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



Ariz., N.Mex., Tex., Utah, Mexico (Chihuahua, Coahuila).


See comments under 6. Psilostrophe villosa.

Selected References


Lower Taxa

... more about "Psilostrophe tagetina"
John L. Strother +
(Nuttall) Greene +
Riddellia tagetina +
Ariz. +, N.Mex. +, Tex. +, Utah +, Mexico (Chihuahua +  and Coahuila). +
(300–)600–2400 m +
Desert scrub, grasslands, limestone soils, saline flats, sandy soils +
Flowering (Apr–)May–Sep(–Dec). +
Illustrated +
Psilostrophe tagetina var. grandiflora +  and Psilostrophe tagetina var. lanata +
Psilostrophe tagetina +
Psilostrophe +
species +