*Sphenoclea zeylanica Gaertner. Phen: Jul-Nov. Hab: Rice plantations, reservoirs, other disturbed wetlands. Dist: Native of Old World tropics.
Origin/Endemic status: Paleotropics
Synonymy: = Ar, Fl6, K1, K3, K4, NcTx, S, Tx, WH3, Rosatti (1986); = Sphenoclea zeylandica – GW2, RAB, orthographic error (presumably from a mistaken notion that the epithet refers to New Zealand rather than Ceylon)