Annual (?) with stiff rather slender root. Stems us. several from stock, 7·5-15 cm. tall, ascending to erect, ± branched (sts much-branched) forming small clumps. Basal lvs thin to rather coriac., few, ovate-spathulate, apparently soon falling; lamina ± 10 × 3-4 mm., on flat petioles up to 10 mm. long. Cauline lvs us. several pairs, sessile or sub-sessile, narrow- to rather broad-ovate, acute, ± 10-15 × 4-6 mm., sts lanceolate. Fls solitary, terminal. Calyx ± 15-20 mm. long, = corolla or nearly so; cut almost to base into narrow-subulate acute to sub-acuminate lobes. Corolla white, cut 4/5 way into narrow ovate-lanceolate, acute to acuminate, subapiculate, conspicuously veined lobes.