13. Hydrocotyle salwinica R. H. Shan & S. L. Liou, Acta Phytotax. Sin. 9: 131. 1964.
怒江天胡荽 nu jiang tian hu sui
Hydrocotyle salwinica var. obtusiloba S. L. Liou.
Stem 50–70 cm, erect or decumbent, densely hirsute. Petioles 1–7.5 cm, stout, densely covered with dark purple-brown hairs; leaf blade reniform-orbicular, base deeply cordate, 1.5–3.5 × 2.5–6 cm, shallowly 7–9-lobed, lobes deltoid or obtuse-deltoid, both surfaces densely dark brown hirsute, finely serrate or doubly serrate; the principal nerves 7–9. Umbels many-flowered, densely capitate in flower; peduncle 1.5–8 cm, usually longer than petioles, densely hirsute; pedicels ca. 0.5 mm in flower, 1–2 mm in fruit, forming dense capitate fruiting umbels. Petals ovate, white or pale green, usually with purple spots. Fruit ovoid to globose, ca. 1.5 × 2 mm, deep yellow to dark purple. Fl. and fr. Jun–Aug.
Pinus woods, mountain slopes, valleys, moist grassy places; 1600–3100 m. E Xizang, NW Yunnan.
The Chinese record in FRPS (55(1): 26. 1979) of Hydrocotyle hookeri is referable to this species.