Erect annual ± 15-30 cm. tall; stems simple or sparingly branched, rather slender; branches decumbent in lower part, then ascending, weak. Basal lvs in rosettes, diverse in size and shape on same plant; lamina ± 10-30 × 8-15 mm., on very short petiole to almost sessile, ovate- to oblong-spathulate to broad-oblong, obtuse, thin. Cauline lvs 1-2 pairs, ovate to oblong, sessile by broad almost cordate base, ± 20 × 15 mm. Fls axillary, paired or solitary, and in terminal 3-12-fld umbels, each subtended by 1 or more linear-subulate bracts, sts in whorls of 3-5. Calyx 6-7 mm. long, cut c. 3/4 way into narrow-oblong obtuse thin lobes. Corolla white, 8-9 mm. long, narrowly subcampanulate, cut ?-3/4 way into oblong or obovate-oblong lobes; veins distinct, sts pink.