Nanhaia is a genus of flowering plants belonging to the family Fabaceae.

[1] Nanhaia species are twining vines, sprawling or scrambling among rocks and scrub.

The erect or pendant inflorescence is a panicle, 4–20 cm (2–8 in) long, frequently composed of several leafy lateral racemes.

The individual flowers are 16–32 mm (0.6–1.3 in) long and have the general shape of members of the subfamily Faboideae.

Nanhaia has larger flowers (usually over rather than under 15 mm (0.6 in) long) and densely hairy rather than hairless ovaries.