ABSTRACT
Botanical description: Biennial with tuberous tap root; stem up to 100 cm tall, branched, ± hairy below and glabrous above. Lower leaves grass-green, lyrate-pinnatiŽd, usually Žve-jugate, 10-30 cm long, 5-10 cm broad, stalked, bristly; middle and upper leaves glabrous and glaucous, sessile, oblong-lanceolate, at least one-half clasping the stem with broadened cordate base. Racemes 30-40 ˜owered, corymbose above, lengthening late so that the opened ˜owers overtop the buds. Flowers 6-10 mm across, dull to golden yellow; pedicel 6-15 mm long, increasing up to 30 mm in fruit. Sepals 4-6 mm long, 2 mm broad. Petals 0.8-1.0 mm long, 3.5-5 mm broad. Stamens 4-6 mm long. Siliquae 35-80 mm long, 2-3 mm broad, linear, subtorulose, including 10-20 mm long beak (with 0-1 seed); valves membranous, yellowish, glabrous with a prominent mid-vein; septum membranous, not veined; seeds 8-12 in each locule, globose, ca. 1.8 mm in diameter, pale yellowish-brown, black near the hilum, Žnely reticulate-alveolate.
