穴丝荠属 xue si ji shu

Herbs stoloniferous perennial. Trichomes simple, mixed with short-stalked and forked or 3-rayed and stellate ones. Stems erect or decumbent. Basal leaves subsessile or shortly petiolate, rosulate, simple, entire, ciliate, with persistent petiolar bases. Cauline leaves similar to basal ones. Racemes several flowered, ebracteate or basally bracteate. Fruiting pedicels slender, divaricate. Sepals broadly ovate or oblong, ascending, pubescent, unequal, base of lateral pair subsaccate, margin membranous. Petals yellow, longer than sepals; blade obovate, apex subemarginate; claw short, obscurely differentiated from blade. Stamens 6, erect, tetradynamous; filaments filiform, dilated at base; anthers ovate, obtuse at apex. Median glands absent; lateral glands lunar. Ovules 8-10 per ovary. Fruit dehiscent silicles, broadly ovate to ovate-oblong, latiseptate, sessile; valves papery, prominently veined, glabrous or puberulent, smooth; replum rounded; septum complete; style to 0.7 mm; stigma capitate, entire. Seeds blackish, biseriate, wingless, oblong, flattened; seed coat reticulate; cotyledons accumbent.

* One species.