First record of the genus (Nyssaceae) in Vietnam and the lectotypification of C.acuminata.

As a primary source of anticancer camptothecin, (Nyssaceae) is an economically valuable genus and has long been recorded as endemic to China. Here, is reported as a new record to the flora of Vietnam with the discovery of a wild population of from Lai Chau Province of northern Vietnam. Based on the consultation of relevant literature and type specimens of , a lectotype of the species is designated.

-a new species and an updated checklist of Ranunculaceae in Vietnam.

from Ha Giang province, northern Vietnam is described and illustrated. Diagnostic features of the new species are a short rhizomatous stem, (2-)3-foliolate or simple leaves, and pink-purple flowers. The described species is distinct from closely allied in having longer sepals, shape and obcordate apex of petal limbs, shorter flower stem, number and tooth shape of basal leaves; it differs from and in having stem leaf, retuse apex and longer of central leaflet, number and (2-)3-foliated (or simple) of leaf.

A new species and two new records of (Fagaceae) from northern Vietnam.

A new species, Binh, Ngoc & Bon, is described from Xuan Lien Nature Reserve, Vietnam. The new species is morphologically similar to Skan, in having 8-11 pairs of secondary veins, bowl-shaped cupules and ellipsoid to cylindrical-ellipsoid and basally convex nuts. It differs in having serrulate leaf margins only at apical 1/5-1/7, almost entire margins of bracts on cupule and much longer nuts.