Te-tsun Yu (1908–1986) was a Chinese botanist who specialised in spermatophytes, particularly in the Yunnan and Sichuan provinces of China.

He worked as editor of the Flora Reipublicae Popularis Sinicae and director of the Institute of Botany at the Chinese Academy of Sciences.

He was a prolific collector of plant specimens in Yunnan, making expeditions into the largely unexplored mountains in the north west of the province.

Thousands of specimens he collected were exported to Arnold Arboretum in Boston, Massachusetts and Royal Botanic Garden Edinburgh who funded the expeditions in 1937.

This collaboration led to the Flora of China Project which started shortly after Yu's death and was first published in 1994.