Betula austrosinensis

Betula austrosinensis () is a species of birch that is endemic to China where it is found on elevation of .
Description.
The tree is high and is either brown or grayish-brown coloured. Branches are yellowish-brown in colour with elliptic, lanceolate, and oblong leaf blades which are long by wide. It petiole is long while the apex is acuminate. Females have one inflorescence which is erect and oblong, sometimes cylindrical, and is by . It peduncle is long with the bracts length being . The nutlet itself is elliptic and is long and wide. It also have membranous wings and it blooms from June to August while the flowers come out from May to June.