Lepidium tenuicaule Kirk

Perennial. Stems prostrate to ascending, glabrous, (2)-8-15-(30) cm long. Lvs glabrous or with a few hairs on midrib and margins. Basal lvs persistent, pinnate, 2-10 × 0.5-1.5 cm. Pinnae in (5)-7-15 pairs, acutely toothed. Stem lvs toothed at apex, becoming entire, narrow-spathulate to linear-oblanceolate, cuneate at base, long-petiolate, 5-20 × 2-5 mm. Racemes 5-10 cm long at fruiting; rachis and pedicels glabrous or sparsely hairy; pedicels distant, spreading, 2-4 mm long at fruiting. Sepals sparsely hairy or rarely glabrous, 0.5-1 × 0.3-0.5 mm. Petals usually 0, or white, < sepals. Stamens usually 4. Silicles suborbicular, 1.5-2 × 1.5-1.8 mm; style 0.1 mm long, free from the very narrow wing, = or slightly > the very shallow notch; valves glabrous. Seed ovoid, brown, not winged, c. 1 mm long.