This study first found Caesalpinia cucullata Roxb. in Xizang, which belonged to Caesalpinia Linn. 11 newly recorded vascular plants species and 2 varieties were also reported: Botrychium daucifolium Wall. (Ophioglossaceae), Pteris kiuschiuensis var. centrochinensis Ching & S. H. Wu (Pteridaceae), Clematis urophyllaFranch. (Ranunculaceae), Triumfetta rhomboidea Jacq.(Tiliaceae), Sida szechuensis Matsuda (Malvaceae), Urena lobata var. chinensis(Osbeck) S. Y. Hu (Malvaceae), Ludwigia hyssopifolia(G. Don) Exell (Onagraceae), Ludwigia ovalis Miq. (Onagraceae), Mosla dianthera(Buch.Ham.) Maxim. (Lamiaceae),Limnophila sessiliflora(Vahl) Bl. (Scrophulariaceae), Asystasia neesiana(Wall.) Nees(Acanthaceae), Lobelia zeylanica Linn. (Campanulaceae), Pothos repens(Loureiro) Druce (Araceae). These findings further contribute to the richness of plant flora in Xizang, and provide new insights into the relationship between vascular plants and their neighboring flora.