Glycosmis longipetala F.J.Mou & D.X.Zhang is described from Guangxi and Yunnan provinces in southwestern China.The new species is similar to G.cochinchinensis(Lour.) Pierre ex Engl.by its simple leaves,but distinguishable in having long-elliptic or oblanceolate(vs.ovate) leaves,long-ovoid to ellipsoid(vs.ovoid) floral buds,ovaries with many tubercles(vs.smooth) and glabrous(vs.pubescent) stamens.The pollen grains of the new species are 23.9±3.09(20.8-27.0)×22.0±1.80(20.4-24.4) μm in size with reticulate exine ornamentation in equatorial area and foveolate in polar area.The chromosome number of the new species is 2n=72.
