丝毛栝楼 si mao gua lou

Stems angular-striate, sparsely sericeous. Petiole slender, 3.5-7 cm, white sericeous; leaf blade adaxially deep green, ovate-cordate, 8-17 × 6-10 cm, papery, deeply 3-5-lobed; middle lobes narrowly lanceolate or ovate-lanceolate, abaxially densely white sericeous, adaxially sparsely sericeous, margin denticulate, apex acuminate. Male flowers solitary; pedicel and flowering bud densely white sericeous; mature flowers unknown. Female flowers solitary; pedicel 1.5-2.5 cm, densely white sericeous; calyx tube tubular, ca. 1 × 0.4 cm, densely white sericeous; segments linear-lanceolate, ca. 5 × 2 mm, entire; ovary oblong, ca. 1.5 × 0.7 mm, densely white sericeous. Fruit unknown. Fl. Apr-Jul.

● Thickets on mountain slopes or beside rivers; 700-1500 m. W Guangxi, SW Guizhou, SE Yunnan.