Hypolytrum nemorum
Hypolytrum nemorum is a species of plant in the family Cyperaceae. Seen in Indo-Malesia, from Fiji to China. Description 
It is erect rhizomatous perennial plant growing up to  with wood rhizome. Flowering throughout the year, the terminal inflorescences is corymbose-panicle. References 

Cyperaceae
Plants described in 1824