Juncus papillosus

Juncus papillosus, the papillose rush, is a species of flowering plant in the family Juncaceae, native to eastern China, the Korean Peninsula, Japan, and the southern part of the Russian Far East. A perennial 15 to 50 cm tall with terete stems and leaves, it is typically found in swampy meadows. Its chromosome count is 2n=40.