Leaf-lamina 7·5–8 × 9–10·5 cm., broadly ovate in outline, cordate, finely puberluous above, more densely beneath, especially on veins, palmately 5-lobed, the lobes elliptic, narrowed below, entire, rounded, apiculate, the central largest.
Stems when young herbaceous, finely pubescent, when older softly ligneous, with greyish lenticellate papyraceous bark.
Petioles 1·5–2 cm. long, finely puberulous.
Scandent perennial to 4 m.
Fruits and seeds unknown.
Female flowers unknown.
Tuber large.