Carex duvaliana is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to southern parts of Japan and south eastern parts of China.[1]
The species was first described in 1878 by the botanists Adrien René Franchet and Ludovic Savatier in 1878 as a part of the work Enumeratio Plantarum in Japonia Sponte Crescentium.[2]