Perennials; (stoloniferous); cau-dex branched (sparsely covered with petiole remains, branches slender, creeping, loosely matted); often scapose. Stems unbranched, 0.4-1.5 dm, gla-brous or pubescent throughout, trichomes simple and short-stalked, 2-or 3-rayed, 0.1-0.5 mm. Basal leaves not rosulate; (subopposite); petiolate; petiole base and margin ciliate or not, (trichomes simple, 0.2-0.8 mm); blade oblanceolate or lanceolate, 0.5-1.5 cm × 1.5-5 mm, margins entire, surfaces glabrous or sparsely pubescent with simple and stalked, 2-4-rayed trichomes, 0.1-0.5 mm, (midvein obscure abaxially). Cauline leaves (0 or) 1 or 2; (subopposite); sessile; blade ovate or oblong, margins entire, surfaces pubescent as basal. Racemes 5-13-flowered, ebracteate, elongated in fruit; rachis not or slightly flexuous, glabrous or pubescent as stem. Fruiting pedicels horizontal to divaricate, often curved upward, 6-13(-17) mm, glabrous or sparsely pubescent, trichomes simple and 2-rayed. Flowers: sepals ovate, 2-3 mm, glabrous or pubescent, (trichomes simple); petals golden yellow, obovate, 3.5-6 × 2-3 mm; anthers ovate, 0.3-0.5 mm. Fruits oblong, plane, flattened, 6-9 × 2-3 mm; valves glabrous; ovules 8-20 per ovary; style 0.4-1 mm. Seeds ovoid, 0.9-1 × ca. 0.6 mm. 2n = 16.
Home