Stems 3-12 dm, sparsely hirsute proximally, glabrous distally. Cauline leaves: blade conduplicate distally, margins entire, surfaces glabrous. Racemes not secund; rachis straight. Fruiting pedicels 4-8 mm, glabrous. Flowers: sepals greenish white, white, or pale yellow, 7-11 mm, glabrous; petals white (with light brown or purplish veins), 11-17 mm; adaxial filaments 8-10 mm. Fruits divaricate to ascending, straight; valves glabrous. 2n = 28.