First distribution records of Calamagrostis abnormis (Poaceae, Agrostidinae) from Sichuan and Xizang Provinces, China

Calamagrostis abnormis, a Sino-Himalayan species, is reported with new distribution records in southern Sichuan and southeastern Xizang, China. The species was previously recorded to be distributed in Yunnan and western Guizhou in China, Nepal, Bhutan, India, and Northwest Vietnam. The general distribution map of C. abnormis is presented.