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FNA | Family List | FNA Vol. 20 | Asteraceae | Aphanostephus

1a. Aphanostephus skirrhobasis (de Candolle) Trelease var. kidderi (S. F. Blake) B. L. Turner, Phytologia. 56: 94. 1984.

Aphanostephus kidderi S. F. Blake, Contr. Gray Herb. 53: 23. 1918

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.

Flowering Mar–Jun(–Aug). Sandy or gravelly soils, often in matorral and scrublands; 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.


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