Biennials or perennials; (short-lived); caudex simple (poorly developed, without persistent leaf bases); not scapose. Stems usually branched, 1.1-3.4 dm, hirsute proximally, trichomes mostly simple and 2-rayed, 0.2-1.5 mm, pubescent distally, trichomes mostly 2-or 3-rayed, 0.2-1 mm. Basal leaves rosulate; petiole (obscure), ciliate, (trichomes simple and 2-rayed); blade obovate to oblanceolate, 1.6-2.5 cm × 5-10 mm, margins usually entire, rarely denticulate, surfaces pubescent, abaxially with stalked, mostly cruciform trichomes, 0.5-1 mm, adaxially with simple and stalked, 2-4-rayed ones. Cauline leaves usually 1-5; sessile or subsessile; blade oblanceolate to oblong, margins often denticulate, (ciliate proximally, with 2-or 3-rayed trichomes). Racemes 9-25-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent, trichomes 2-or 3-rayed. Fruiting pedicels horizontal to divaricate-ascending, usually straight, rarely curved upward, 7-10 mm, pubescent, trichomes 2-or 3-rayed. Flowers: sepals oblong-obovate, 2-3.5 mm, pubescent, (trichomes short-to long-stalked, 2-4-rayed, 0.2-0.8 mm); petals yellow (often fading whitish), oblanceolate, 3-5 × 1-1.5 mm; anthers ovate, 0.4-0.5 mm. Fruits narrowly elliptic to slightly falcate, plane, flattened, (7-)10-16 × (2-)2.5-3.7 mm; valves pubescent, trichomes short-stalked, 2-4-rayed, 0.2-0.5 mm; ovules 14-22 per ovary; style 0.9-1.2 mm. Seeds oblong, 1.1-1.5 × 0.7-0.9 mm. 2n = 20.
Home