Repert. Spec. Nov. Regni Veg. 7: 196. 1909 ,.
Plants light green, stoloniferous or mat-forming, 0.2–3 dm. Stems usually prostrate or arching. Leaves often crowded near plant base, petiolate or nearly sessile; blade orbiculate to broadly spatulate, 0.5–6 cm, base decurrent, broadly cuneate (or somewhat rounded), apex obtuse. Inflorescences terminal and axillary in distal leaves, racemose, sessile or short-pedunculate; peduncle to 1.5 cm, shorter than to equaling stem. Pedicels usually spreading, bracteate, 1.4–10 mm, glabrous; bract proximal to midlength. Flowers: calyx 1–2 mm, lobes triangular-ovate, equaling or longer than tube, apex acute, not glandular; corolla white, 1–3 mm, lobes oblong, longer than tube, base glabrous, apex rounded or slightly emarginate; staminodes 5. Capsules 2–3 mm.
Phenology: Flowering spring–fall.
Habitat: Moist to wet sandy places
Elevation: 1000-2000 m
Ariz., Mexico (Durango).
Of conservation concern.