Perennials, subshrubs, or shrubs;
(sometimes suffrutes-cent); (glaucous or not), mostly glabrous.
erect, unbranched or branched (few) proximally and distally, (1.2-) 3-12(-15.3) dm.
(withered by flowering); similar to cauline.
petiole 0.7-6.2 cm; blade (fleshy), oblanceolate to broadly lanceolate or ovate in outline, or (distally) lobed or linear to narrowly lanceolate, 3-15 cm (smaller distally), margins lyrate-pinnatifid or runcinate, or (distal) pinnately lobed or entire.
horizontal to divaricate, 3-11 mm.
sepals oblong-linear, 8-16 mm; petals yellow, oblanceolate to oblong, 8-20 × 2-3 mm, claw 4-10 mm, wider at base, densely pubescent inside; filaments 11-28 mm, pilose at base; anthers 3-5 mm; gynophore 7-28 mm.
usually spreading to divaricate, rarely ascending, often strongly curved downward, not tortuous, (smooth), terete, 3-9 cm × 1.5-3 mm; ovules 10-38 per ovary; style 0.2-0.6 mm.
(sometimes black), oblong, 2.5-4.5 × 1.2-2 mm.
Varieties 3 (3 in the flora): w, c United States.
SELECTED REFERENCE Lichvar, R. W. 1983. Evaluation of varieties in
(Cruciferae). Great Basin Naturalist 43: 684-686.