Not an accepted name (status: unknown).
The accepted name is
Fimbristylis juncea (G.Forst.) R.Br. ex Roem. & Schult., 1817.
Fimbristylis juncea var. marquesana
(Steud.) Fosberg, 1988
2% complete
No common name
J. Jap. Bot. 63: 83 (1988)
There is no corrections for Fimbristylis juncea var. marquesana yet.