[Pharmacognostic studies on Begonia sinensis rhizome].

Objective: To establish the characteristic method of rude medicinal material of rhizome of Begonia sinensis.

Method: The characteristic features of the rhizome were studies by morphological and microscopic observation.

Results: The description and transverse features of transverse section of the rhizome were described, and in the powder the microscopic features such as cluster needle crystals, tentacle, ring-thread vessel were found.