Sebaea

Annual, biennial, or perennial herbs, erect or procumbent; stems frequently 4-angled or -winged, glabrous, papillose-puberulous, or scabrid along angles. Leaves opposite, radical or cauline, well developed or reduced, linear-lanceolate to suborbicular, often sessile and cordate at base. Flowers borne in 1-many-flowered cymes; cymes solitary or arranged in corymbs. Calyx 4- or 5(6)-segmented or shortly tubular; segments lanceolate to ovate or obovate, frequently with thin, hyaline margin, entire or +/- erose, keeled or winged, sometimes papillose, bristly or scabrid along keels or wings. Corolla 4- or 5(6)-lobed, yellow, cream or white; tube cylindric or funnel-shaped, long or short; lobes spreading, contorted in aestivation, frequently clawed. Stamens 4 or 5; filaments short or long, arising in corolla sinuses or in tube; anthers included in corolla tube or exserted, with 0-3 minute or conspicuous glands. Ovary 2-locular with many axile ovules, ovoid, obovoid, or almost globose; style filiform, included or exserted, often with additional stigmatic swellings which are free from or confluent with stigma; stigma capitate, clavate, or long-linear, 2-lobed or entire. Capsule septicidally 2-valved, ovoid or obovoid, membranous or coriaceous. Seeds ridged or frilled.