2. Utricularia L., Species Plantarum 1: 18 (1753).

Terrestrial, helophyte, epiphyte, rheophyte, lithophyte or hydrophyte herbs. Aerial or submerged leaves, laminar, cylindrical or dichotomous and capillary. Utricles (traps) on stolons and leaves. Glabrous scape, few hydrophyte species bear a whorl of floats at the base of the scape. Basifixed or peltate scales, bracts and bracteoles (if present), free or basally connate. Ascending or deflexed pedicels in fruits. Calyx with 2 usually heteromorphic sepals, with entire, denticulate or deeply fimbriate margins, inconspicuous or conspicuous nerves, prominent or not. Corolla with gibbous or non-gibbous palate, spur parallel or perpendicular to the lower lip. Longitudinal, circumscissile, bivalvate or apparently indehiscent capsule.