Bahia bigelovii

Annuals, 10-30+ cm. Stems mostly erect. Leaves all or mostly opposite (distal sometimes alternate); blades simple or 1-2-ternately lobed, lobes filiform to linear, 10-25(-50+) × 0.5-1(-2+) mm, faces sparsely scabrellous, usually gland-dotted as well. Involucres 3-4+ × 7-9+ mm. Ray florets 5-9(-13+); corolla laminae 4-5+ mm. Disc florets 25-50+; corollas 1.5-3 mm. Cypselae 2-3.5+ mm, faces ± hirtellous; pappi of ± ovate to quadrate, apically ± muticous scales 0.5-1 mm. 2n = 22.

Flowering Jun-Oct. Sandy soils; 1500-1900 m; Tex.