Perennials; (cespitose); caudex branched (with persistent leaf bases, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.5-1.5(-1.8) dm, usually sparsely pubescent proximally, usually glabrous distally, rarely throughout, trichomes simple, 0.3-0.8 mm, often with smaller, 2-4-rayed ones. Basal leaves rosulate; shortly petiolate; petiole base sometimes ciliate (margin not ciliate, trichomes simple and 2-rayed, 0.2-0.5 mm); blade spatulate to obovate, 0.7-3.5 cm × 3-10(-12) mm, margins usually entire, rarely obscurely dentate (near apex), surfaces sparsely pubescent with stalked, (2-)4 (or 5)-rayed trichomes, 0.05-0.5 mm, (midvein obscure). Cauline leaves 0. Racemes 14-36-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels ascending to divaricate-ascending, straight, (not expanded basally), (4-)5-12 (-15) mm, glabrous. Flowers: sepals ovate, 2-3 mm, glabrous or sparsely pubescent, (trichomes simple and short-stalked, 2-4-rayed); petals orange-yellow (fading pale yellow), broadly spatulate to subovate, 5-6 × 1.8-2.8 mm; anthers ovate, 0.4-0.5 mm. Fruits lanceolate to linear-lanceolate or ovate, plane (not curved), flattened, 6-12(-17) × 2-3 mm; valves glabrous; ovules 12-20 per ovary; style 0.4-1 mm. Seeds oblong, 1-1.3 × 0.6-0.8 mm. 2n = 26.
Home