Castanopsis grandicicatricata N.H.Xia & D.H.Vuong:A newly recorded species of Castanopsis(Fagaceae)from China
[Objective]Castanopsis grandicicatricata N.H.Xia &D.H.Vuong is a species of Castanop-sis(Fagaceae)originally endemic to central and northern Vietnam,but now a scattered population was discovered in the Dawei Mountain area of the Pingbian Miao Autonomous County,Yunnan Province,Chi-na.This study aims to check its identity,to verify the close relatives from the literatures based on mor-phological speculation,and to show its systematic status.[Methods]Spacer ITS2 of nuclear rRNA genes 5.8S and 26S and chloroplast gene rbcL were used as molecular markers to reconstruct systematic tree.[Results]Morphologically,it could be distinguished from other Castanopsis species known in China by its cupule of 4.5-6.0 cm in diameter and the spine base was connate into tree-like branched bundles with a spheroid nut,where scar covering ca.2/3 of the nut.The morphology-based speculation of the close rela-tives reported in the literatures was validated through phylogenetic tree restruction,C.mekongensis is one of its close relative.[Conclusion]C.grandicicatricata is a newly recorded species of Castanopsis from China.This new record holds significant implication for the study of the flora of southeast Yunnan and northern Vietnam.
NETL
NSTL
万方数据
维普
