T: California, Tehama Co., 2 mi [3 km] S of Red Bluff, 20 Apr 1916, A.A.Heller 12326; holo: US; iso: CAS, NZ etc.
Annuals, 2–12.5 cm tall. Stem erect, leafless, (0.1–) 0.2–0.7 (–0.8) mm thick; basal leaves to 4 cm long. Flowers 1–7, commonly trimerous; bracts 2–8, round to acutely ovate, unpigmented or castaneous-brown at centre, 0.7–2.4 mm long; pedicels 0.4–2.2 (–2.5) mm long. Tepals narrowly lanceolate to ovate or oblong, (1.5–) 2.2–4.6 mm long, 0.5–1.4 mm wide, subequal or the inner longer, (rounded–) obtuse to acuminate, ±erect, straight, with central band remaining green or turning reddish. Stamens 3 (–5), 1.7–3.7 mm long; anthers 0.9–3.2 mm long, 1–4 times filament length; style (0.9–) 1.4–4.0 mm long; stigmas 1.3–4.0 mm long, white. Capsule globose to ellipsoid or oblong, (1.5–) 2–4.5 mm long, 0.5 mm longer or shorter than tepals, light to dark reddish or maroon, not contrasting strongly with tepals. Seeds to 12 per row and c. 150 per capsule, ovoid, 0.35–0.45 mm long, usually umbonulate, sometimes apiculate as well, smooth or faintly reticulate.