Plinthanthesis

Plinthanthesis is a genus of Australian plants in the grass family.
; Species

Plinthanthesis paradoxa S.T.Blake - New South Wales, Victoria
Plinthanthesis rodwayi S.T.Blake - New South Wales
Plinthanthesis urvillei Steud. - New South Wales

; formerly included
see Rytidosperma

''Plinthanthesis tenuior - Rytidosperma tenuius''