Aphanostephus skirrhobasis var. kidderi

(S. F. Blake) B. L. Turner

Phytologia 56: 94. 1984.

Basionym: Aphanostephus kidderi S. F. Blake Contr. Gray Herb. 53: 23. 1918
Treatment appears in FNA Volume 20. Treatment on page 352.

Plants (10–)15–35 cm. Stems erect to decumbent, hirsuto-pilose and/or puberulent, hairs (0.2–)0.5–1.2 mm. Leaves not strongly thickened or felty gray-hairy. Ray florets 1–9–40. Pappi of acute or awn-tipped or setiform scales 0.4–2 mm. 2n = 6.

Phenology: Flowering Mar–Jun(–Aug).
Habitat: Sandy or gravelly soils, often in matorral and scrublands
Elevation: 0–50 m



Tex., Mexico (Tamaulipas).


Apparent intergrades between var. kidderi and var. skirrhobasis are relatively common. There is a greater tendency in Aphanostephus skirrhobasis for leaves to be lobed or pinnatifid over the whole stem than in the other species.

Selected References


Lower Taxa