Annuals, 10–45 cm; vestiture hispidulo-puberulent, stem hairs spreading to deflexed, 0.2–0.6 mm. Phyllary apices acute. Ray florets 20–41. Disc florets: corolla bases not conspicuously swollen and indurate. Cypselae: hairs apically straight; pappi minutely ciliate crowns 0.1–0.2 mm or absent or nearly so. 2n = 8.
Ariz., N.Mex., Okla., Tex., Mexico.
Varieties 3 (2 in the flora).
|1||Involucres 4.7–7.5 mm; cypselae (1.1–)1.4–1.6 mm; pappi 0 or minutely ciliate rings 0.1–0.2 mm, sometimes nearly smooth at apices||Aphanostephus ramosissimus var. humilis|
|1||Involucres 3.2–4.8 mm; cypselae (1–)1.2–1.4 mm; pappi coroniform, indurate, cupuliform, 0.2–0.6 mm, usually minutely ciliate-tipped||Aphanostephus ramosissimus var. ramosissimus|