Chaetopappa parryi

Perennials, 10-35 cm, eglandular; fibrous-rooted with slender, branching rhizomes. Leaves (basal often persistent at rhizome tips) not densely overlapping; blades spatulate to spatulate-obovate, 15-30(-40) × 2-5 mm, gradually or little reduced distally, herbaceous, bases attenuate, not clasping, flat (2-grooved adaxially), faces hispido-pilose to strigose or glabrate. Involucres cylindro-turbinate, 4-6 × 2-4 mm. Ray florets 7-9; corollas white. Disc florets 10-15, bisexual. Cypselae 1.9-2 mm, 3-5-nerved, faces glabrate to sparsely strigose; pappi hyaline crowns of basally fused scales 0.3-0.8 mm in 1 series. 2n = 16.

Flowering May-Sep(-Oct). Rocky slopes, talus, crevices, chaparral, oak, oak-juniper, or oak-pine-fir woods; 1400-1600 m; Tex.; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas).