Thymophylla pentachaeta var. belenidium
Sida 11: 377. 1986.
Basionym: Dyssodia belenidium de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 292. 1838
Synonyms: Dyssodia pentachaeta var. belenidium (de Candolle) Strother Dyssodia thurberi (A. Gray) B. L. Robinson
Leaves 10–20 mm overall, lobes 3–7, subequal. Peduncles 20–50 mm. Calyculi of 3–5 bractlets. Involucres obconic to campanulate, 4.5–6 × 4–5 mm. Phyllaries ca. 13, margins of outer distinct almost to bases, abaxial faces glabrous (margins ciliate). Disc florets 50–70. Pappi usually of 10, 3-aristate scales, sometimes of 5 muticous scales alternating with 5, 3-aristate scales. 2n = 32 (Argentina).
Phenology: Flowering spring–summer.
Habitat: Sandy or rocky soils of desert washes and fans, commonly with limestone, often ruderal along roadways
Elevation: 500–2500+ m
Distribution
Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico, South America (Argentina).
Discussion
Selected References
None.
Lower Taxa
None.