Enydra

Erect or prostrate, marsh or aquatic herbs. Leaves opposite, sessile or subsessile, simple, lanceolate, margins entire or remotely denticulate. Capitula radiate, axillary, sessile or shortly pedunculate. Involucral bracts 4, leafy, in 2 rows of opposite pairs. Receptacle convex or conical; paleae sheathing florets. Ray florets female; corolla pale yellowish, strap-shaped, short and broad. Style branches linear. Disc florets bisexual or functionally male; corolla pale yellowish, tubular, widening above, 5-lobed. Anthers with deltoid apical appendage, bases obtuse. Style branches oblong, flattened, truncate and shortly penicillate, with minute sweeping hairs outside and marginal stigmatic papillae. Cypselas surrounded by persistent paleae, usually somewhat compressed. Pappus 0. x = 11 (1 report).