Plants annual or perennial, herbaceous, glabrous or densely stipitate-glandular, not glaucous. Stems sprawling, branching proximally, 10–30+ cm. Leaves opposite; stipules ± persistent, divided into 2 or 3 filiform segments, 0.5–3.5 mm; petiole (1–) 3–6 mm; blade broadly ovate, deltate, cordate, or reniform, (0.2–) 0.5–1.6 cm × 4–12 mm, base truncate to rounded, apex acute to cuspidate. Inflorescences terminal, open, 3–15-flowered cymes. Pedicels shorter to longer than subtending bracts at maturity. Flowers: sepals with 3 distinct veins arcing outward at midsection and ± confluent apically, lanceovate to elliptic (herbaceous portion linear-lanceolate to narrowly ovate), 3–4 (–5) mm, subequal, apex acute to acuminate (herbaceous portion often obtuse), not hooded, glabrous; petals 2-fid for 1/2–3/4 their length, 2.7–6 mm, subequal to sepals, lobes 1-veined, vein dichotomously branched distally, oblong, trunk entire, base abruptly tapered, apex deeply notched. Seeds dark-brown to blackish, snail-shell-shaped, 0.5–0.7 mm; tubercles prominent, conic.

Phenology: Flowering spring–late fall.
Habitat: Montane chaparral and woodlands, igneous-rock mountains
Elevation: 1400-2500 m

Distribution

• Generated Map
• Legacy Map

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (San Luis Potosí), Mexico (Zacatecas)

Discussion

Selected References

None.

Lower Taxa

None.

"/2" is not declared as a valid unit of measurement for this property.