Herbs perennial. Roots fibrous. Rhizomes horizontal, elongate. Stems creeping proximally, ascending distally, branched, to 30 cm; internodes 1.5--7 cm × 1--3 mm, with a line of multicellular puberulent hairs. Leaves all cauline, sessile; leaf sheath 5--6 mm; leaf blade ovate-cordate or ovate, 1--3 × 0.8--2 cm, glabrous, base usually shallowly cordate, clasping, rarely rounded, apex acute or obtuse. Flowers 2--4, in fascicles in leaf axils; bracts ovate-oblong, 5--7 × ca. 3 mm, membranous; pedicel ca. 1.4 cm, to 2 cm in fruit, jointed at middle, straight in fruit. Sepals ovate, ca. 4 mm. Petals orange-yellow, orbicular or ovate. Fertile stamens 3; filaments proximally brown torulose villous; staminodes 3; antherodes sagittate. Capsule ellipsoid, trigonous, ca. 6 × 2.5--3 mm. Seeds unseriate, pitted.

* Rice fields or by water. S Guangxi (Fangcheng Ge Zu Zizhixian).