Picradeniopsis oppositifolia

(Nuttall) Rydberg

in N. L. Britton, Man. Fl. N. States, 1008. 1901.

IllustratedEndemic
Basionym: Trichophyllum oppositifolium Nuttall Gen. N. Amer. Pl. 2: 167. 1818
Synonyms: Bahia oppositifolia (Nuttall) de Candolle
Treatment appears in FNA Volume 21. Treatment on page 385.

Plants ± erect or spreading, 3–15(–20+) cm. Leaf lobes lanceolate to linear, 10–25+ × 1–3(–8) mm, faces ± canescent-scabrellous and gland-dotted. Involucres broadly turbinate to hemispheric, 5–6+ × 6–9+ mm. Ray florets 3–5(–6); corollas pale yellow, laminae 3–5 mm. Disc florets 30–60+; corollas 3.5–5 mm. Cypselae 3–5 mm, usually gland-dotted, seldom hirsutulous; pappus scales usually ovate or elliptic to obovate, sometimes lanceolate, 0.5–1.5 mm. 2n = 48.


Phenology: Flowering Jun–Oct.
Habitat: Roadsides, saline flats, shale sites
Elevation: 900–2500 m

Distribution

V21-968-distribution-map.gif

Ariz., Colo., Kans., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
John L. Strother +
(Nuttall) Rydberg +
Trichophyllum oppositifolium +
Ariz. +, Colo. +, Kans. +, Mont. +, Nebr. +, N.Mex. +, N.Dak. +, Okla. +, S.Dak. +, Tex. +  and Wyo. +
900–2500 m +
Roadsides, saline flats, shale sites +
Flowering Jun–Oct. +
in N. L. Britton, Man. Fl. N. States, +
Illustrated +  and Endemic +
Bahia oppositifolia +
Picradeniopsis oppositifolia +
Picradeniopsis +
species +