Slender lax annual arising from weak often filiform root; stems very slender, weak, decumbent, then ascending to erect, openly branched, ± 7·5-20-(35) cm. long; branches weak, few to many, lax. Basal lvs spathulate or oblong-spathulate; lamina thin, of lower lvs ± 15-20 × 8-10 mm., on petiole ± = lamina. Cauline lvs smaller, remote, sessile or subsessile, oblong or ovate-oblong, obtuse or subacute, thin; upper-most reduced to bracts. Fls terminal, 8-12-(17) mm. long, solitary or paired, on almost filiform pedicels up to 3 cm. long. Calyx cut 3/4 way into linear-subulate acute to acuminate lobes c.*8 mm. long, midrib us. distinct. Corolla white, narrow-campanulate, cut > 1/2 way into narrow-ovate to oblong, acute to subacute lobes.