Crassula natans Thunb.

Annuals, rarely perennials, with branches 20-250 mm long, erect, decumbent or floating in water, more or less branched, sometimes with underground branches. Leaves obovate, oblanceolate, rarely narrowly elliptic to oblong, 3-12 x 1-4 mm, obtuse to acute, dorsiventrally flattened, slightly fleshy but rarely convex below, glabrous, green. Inflorescence with terminal flowers in the axil of leaf-like bract due to sympodial growth. Calyx: lobes broadly triangular, 0.3-0.5 mm long. Corolla shallowly cup-shaped, scarcely fused at base, white sometimes tinged pink; lobes obovate to spathulate, 1.5-2 mm long, obtuse, often strongly recurved from about the middle. Stamens with yellow to purple anthers. Squamae oblong-cuneate, 0.4-0.6 x 0.1-0.2 mm, truncate to rounded, slightly and gradually constricted towards base, slightly fleshy, white or yellow and often tinged red.