Perennial with erect simple stems up to ± 30-40 cm. × 2-3 mm., subterete, striate, margined. Basal Ivs crowded in broad rosettes; lamina thin, obovate-spathulate, ± 8-14 × 2-3·5 cm., obtuse to subacute, with 3-5 arcuate nerves and evident reticulations, narrowed to petiole ± ═ lamina. Cauline lvs 2-3 pairs, sessile, subacute, semiamplexicaul, diminishing upwards from c. 7 × 3 cm. to 3 × 1·5 cm. or less, internodes ± 12 cm. Fls several in bracteate terminal and axillary umbels. Bracts broad, nearly concealing fls; pedicels almost filiform, 4-5 mm. long. Calyx c. 7-10 mm. long, cut 3/4 way into linear-subulate lobes with evident midrib; sinus rounded. Corolla white, c. 12-15 mm. long, deeply cut into 5 acute or subacute apiculate lobes.