J. Bot. Agric. 3: 162. 1815.
Plants not scapose; pubescent, trichomes appressed, unicellular, medifixed. Stems erect, procumbent, or decumbent [ascending], branched basally [and distally]. Leaves cauline; not rosulate; blade (base not auriculate), margins entire. Racemes (several-flowered, sometimes bracteate at base). Fruiting pedicels ascending [divaricate], slender. Flowers: sepals oblong [ovate]; petals obovate [spatulate or orbicular], claw differentiated from blade, (margins entire, apex often rounded); stamens slightly tetradynamous; filaments dilated basally; anthers ovate, (apex obtuse); nectar glands (8): 4 lateral (rudimentary), 4 median (cylindrical). Fruits sessile or shortly stipitate, elliptic-suborbicular [orbicular, obovate, elliptic], smooth, convex, latiseptate; valves (papery), each 1-veined, pubescent; replum rounded; septum complete; ovules 2–10 per ovary; stigma capitate. Seeds uniseriate or biseriate, strongly flattened, winged or not, lenticular or ovate [orbicular]; seed coat (reticulate), mucilaginous when wetted; cotyledons accumbent. x = 11, 12, 23.
Introduced; s Europe, sw Asia, n Africa (Mediterranean region), introduced also nearly worldwide.
Species 4 (1 in the flora).