Ophiorrhiza monsvictoriae (Rubiaceae, Rubioideae), a new species from Myanmar

A new species, Ophiorrhiza monsvictoriae S.S.Zhou & L.D.Duan, discovered at Natma Taung (Mt.Victoria) National Park, Chin State, Myanmar, is described and illustrated. The new species is morphologically similar to O. dulongensis, but differs from the latter by its stipules broadly triangular, 2-4 mm long, inflorescence axillary, 1-flowered, bracts lanceolate to subulate, 1-2 mm long, puberulous, calyx pilose, 1-2 mm long, lobes and tube equal length, corolla narrowly funnelform, 15 mm long, puberulous outside.