Dichocarpum nipponicum var.
sarmentosum is a perennial occurring in damp places by a
mountain river. Rhizomes are short and enveloped with bases of broad
petioles, and stems measure 5-18cm tall and emerge 5-7cm-long
runners after flowers. Radical leaves are 3-11cm long, including the
petioles, with broad bases, in a broad-oval shape, comprising three
leaflets with fan-shaped terminals with uneven incisions or
dentitions on the margins. And lateral leaflets cut themselves in
3-5 newly. On-stem leaves are on the upper half, generally of
opposite phyllotaxis, 1.2-4.5cm long inclusive of the petioles in
the shape of a fan-shaped reniform or cut in three lobes anew.
Flowers have five sepals with narrow obovate, 7-9mm long, pale
yellow red-brown portions at the bases, and petals, 5 in number, 4mm
long, linear with circular tips. Bloom time: March-May.