Hydrocotyle dichondroides Makino

This incompletely known species is recorded only from a few collections. It has reputed medicinal value.

Stems slender, filiform, creeping to suberect, pilose. Petioles filiform, 0.5–3 cm, densely hirsutulous with recurved white hairs; leaf blade orbicular-reniform, 0.5–1.5 mm wide, glabrous or shortly puberulent along veins on adaxial surface, thin membranous, very shallowly crenately 5- or 7-lobed, lobes inconspicuously crenulate. Umbels solitary at nodes, 2–8-flowered; peduncles filiform, 1–3 cm, usually longer than leaves; pedicels very short, flowers almost sessile. Petals white. Fruit subglobose, ca. 1 mm wide, glabrous. Fl. and fr. Jun–Sep.

Wet walls and rocks; near sea level. N Taiwan (Taipei) [Japan].