Oplismenus nacreus (Poaceae: Panicoideae), a New Grass from Madagascar.

A new grass species from the forests of northern Madagascar is described and illustrated. It is recognisable by the white pearly sheen of its spikelets. It differs from and , as well as from the other species of , by its ovate whitish spikelets and reduced awns not clearly exceeding the spikelets in length. This formal description follows several collecting events in the mid-twentieth century and re-collection by the author in 2011.