Herbs, annual or perennial. Stems unbranched or sparsely branched ; glandular-pubescent, glabrous, glabrescent, or scabrous. Leaves: stipules absent or scalelike; petiole with pulvinus basally or distally, (petiolule basally adnate, forming pulvinar disc); leaflets 1 or 3[-11] (flat). Inflorescences terminal or axillary (from distal leaves), racemes (flat-topped or elongated); bracts present [absent]. Flowers zygomorphic; sepals persistent, basally connate (1/2 of length), equal (each often subtending a nectary); petals equal; stamens  6; filaments inserted on a discoid or conical androgynophore, glabrous; anthers (oblong to linear), coiling as pollen is released; gynophore recurved in fruit [obsolete]. Fruits capsules, dehiscent, oblong. Seeds 4-25, reniform or ovoid-spheroidal, arillate or not, (cleft fused between ends). x = 10 (-).