FIBIGIA Medik., Pfl.-Gatt.: 90 (1792).

Herbs perennial with woody caudex, sometimes suffrutescent, densely tomentose throughout. Trichomes short-stalked or sessile, 6–8-rayed stellate with rigid or soft, spreading to appressed rays, sometimes on stems, pedicels, and fruits 1 or 2 rays become much larger and the others abort. Multicellular glands absent. Stems erect to ascending, leafy, not spiny. Basal leaves petiolate, rosulate, simple, entire or repand to toothed; cauline leaves short petiolate or sessile, cuneate to attenuate, not auriculate at base, entire, dentate, or repand. Racemes many flowered, bracteate basally to throughout or ebracteate, corymbose, elongated considerably in fruit rachis straight; rachis straight, pubescent; fruiting pedicels ascending or rarely divaricate, recurved, persistent. Sepals ovate to oblong, free, deciduous, erect, equal, base of lateral pair not saccate; petals yellow, erect at base with flaring blade, longer than sepals; blade oblanceolate, apex obtuse; claw differentiated from blade, subequaling or slightly longer than sepals, glabrous, unappendaged, entire; stamens 6, slightly exserted or included, erect, strongly tetradynamous; filaments free, glabrous, median pairs winged, lateral pair minutely appendaged; anthers oblong, not apiculate; nectar glands, 4, lateral, 1 on each side of lateral stamen, median nectaries r absent; ovules 10–16 per ovary; placentation parietal. Fruit dehiscent capsular silicles, oblong to suborbicular, strongly latiseptate, not inflated, unsegmented; valves leathery, not veined, pubescent with stellate trichomes rarely mostly simple or forked, not keeled, smooth, wingless, unappendaged; gynophore absent; replum rounded, concealed by connate valve margins; septum complete, membranous, veinless; style 1–2 mm long, stout, cylindric, persistent, usually pubescent at least near base; stigma capitate, entire or slightly 2-lobed with lobes not connivent, not decurrent, opposite replum, unappendaged. Seeds biseriate, broadly winged all around, suorbicular, strongly flattened; seed coat smooth, not mucilaginous when wetted; cotyledons accumbent.