Perennial arising from stout white fusiform roots. Stems stout, erect, grooved, branched above, to 130 cm tall. Rosette lvs elliptic to ovate to oblong, crenate or serrate; lamina (5)-10-30-(50) × 4-10-(15) cm; petiole 5-20-(50) cm long. Lower stem lvs similar in size and outline, but often deeply pinnatifid; upper stem lvs sessile, linear-lanceolate, toothed or entire, 4-12-(20) × 0.5-1-(3) cm. Panicle to 35 cm long; lateral axillary racemes to 20 cm long. Sepals 2-3 × 1-1.5 mm. Petals 4-5 ×2 mm. Silicle abortive, narrow-cylindric, 2-3 mm long.