T: USA, California, Trinity Co., NE side of the Trinity Alps, Big Flat, 21 Jul 1937, J.T.Howell 13213; holo: CAS; iso: DS, GH, MICH, NY, RSA, UC, US.
Annuals, (0.2–) 0.3–3.6 cm tall. Stem erect, leafless, 0.1–0.5 mm thick; basal leaves to 1.8 cm long. Flowers 1, usually dimerous. Tepals ±lanceolate, (0.8–) 1.9–3 (–3.5) mm long, 0.5–1.2 mm wide, all equal or inner shorter, rounded to acute, usually recurved or erect; central band usually turning reddish. Stamens 2 (–3), (0.7–) 1–1.8 mm long; anthers (0.2–) 0.3–0.7 mm long, 1/3 filament length to almost equal; style 0.1–0.4 mm long; stigmas 0.3–1 mm long, white. Capsule obovoid to ellipsoid or oblong, (1–) 1.9–3.5 mm long, slightly less than to 1.5 times tepal length, usually turning reddish at maturity, not contrasting strongly with the tepals. Seeds to 12 per row and c. 70 per dimerous capsule, ovoid to oblong, 0.3–0.55 mm long, often apiculate, sometimes umbonulate as well, smooth or faintly reticulate.