Peduncles not subtended by bracts or bracts not membranous, 3-5+ × 1-3+ mm. Phyllaries whitish to yellowish, 5-9 × 2-4 mm. 2n = 34. Flowering Mar-Jul. Clays and/or calcareous soils, limestone, grasslands; 10-300 m; Kans., Nebr., Okla., Tex.; Mexico (Coahuila).