Herbs perennial, (20-)30-65(-90) cm tall. Caudex simple or branched. Stems erect, simple, sparsely or rarely densely pubescent with a mixture of simple and sessile stellate trichomes, apically tomentose with appressed stellate ones. Basal leaves rosulate, persistent, sessile or rarely on petiole to 4 cm; leaf blade oblanceolate to spatulate, 1.5-5 cm × 5-11 mm, abaxially sparsely pubescent with stalked, 3-or 4-rayed stellate trichomes, sometimes glabrescent except for margin and midvein, adaxially with a mixture of primarily simple trichomes and fewer stellate ones, rarely exclusively simple, base cuneate, margin dentate or entire, apex obtuse. Cauline leaves 5-20(-40), sessile; leaf blade oblong, lanceolate, or ovate, 1.2-3.5(-5) cm × 4-11 mm, pubescent as basal leaves, base often auriculate or amplexicaul, margin dentate or subentire, apex obtuse or acute. Racemes 20-60(-140)-flowered, bracteate basally to throughout, elongated considerably in fruit. Fruiting pedicels (0.3-)0.7-2(-2.5) cm, divaricate, straight, glabrous adaxially, pubescent abaxially with appressed stellate trichomes. Sepals oblong or ovate, 2-3(-3.5) × 1-2 mm, ascending, abaxially sparsely pilose with primarily simple trichomes, base of lateral pair subsaccate, margin membranous. Petals yellow, obovate, 5-7(-8) × 2-3.5 mm, apex emarginate; claw 1-2 mm. Filaments 2.5-3.5(-4) mm; anthers oblong, 0.6-0.9 mm. Ovules (12-)16-22(-24) per ovary. Fruit oblong, elliptic, or ovate, (0.7-)1-1.5 cm × 3-5(-6) mm, latiseptate, rarely slightly twisted; valves glabrous, with a distinct midvein extending to middle or full length; style 0.5-1.5 mm. Seeds brown, ovate, 1.5-1.9 × 1-1.3 mm. Fl. and fr. Jun-Aug.
Home