Contr. U.S. Natl. Herb. 13: 428. 1911.
Herbs, finely pubescent with pale, curved hairs (rarely capitate-glandular). Stems ascending to trailing, 5–20 dm. Leaf-blades rhombic to ovate or broadly oblong, proximal blades 10–50 × 8–40 mm, proportionately about as wide as distal blades, margins usually sinuate, often undulate, pubescent. Perianths pale-pink to deep pink or red-violet [greenish white], 6–8 mm. Fruits notably gibbous, 6–8 [–11] mm, usually prominently warty at least on gibbous side.
Phenology: Flowering late spring–fall.
Habitat: Fine or rocky soils, flats, washes, slopes, roadsides, desert to semiarid or subtropical scrub
Elevation: 0-100[-2000] m
Tex., ne Mexico (Coahuila), ne Mexico (Nuevo León), ne Mexico (Tamaulipas)
"thin" is not a number."dm" is not declared as a valid unit of measurement for this property.