DYSOXYLUM MOLLISSIMUM (SPRENG.) BLUME EX G. DON (MELIACEAE), A NEW RECORD FOR THE FLORA OF VIETNAM

Luong Van Dung^a*, Le Ngoc Trieu^b, Nguyen Tan Dat^b, Nguyen Van Ket^c, Hoang Thanh Truong^d

^aCenter for Biodiversity and Climate Change Research, Dalat University, Lam Dong, Vietnam

^bFaculty of Biology, Dalat University, Lam Dong, Vietnam

^cFaculty of Agriculture and Forestry, Dalat University, Lam Dong, Vietnam

^dForest Science Institute of Central Highlands and South of Central Vietnam (FSICHSCV), Lam Dong, Vietnam

^*Corresponding author: Email: dunglv@dlu.edu.vn

Abstract

Dysoxylum mollissimum (Spreng.) Blume ex G. Don is a new record for the flora of Vietnam. This species is distributed in primary and secondary forests in scattered populations at elevations of 800–1200 m above sea level in the provinces of Gia Lai and Lam Dong in the Central Highlands of Vietnam. It is most similar to Dysoxylum loureiri (Pierre) Pierre in the characters of general vegetative habit and the shape of the leaves, calyx, petals, and stamens. The investigated taxon is closely related to Didymocheton mollissimus (Spreng.) Mabb., a synonym of Dysoxylum mollissimum (Spreng.) Blume ex G. Don, in all three clustering methods used. This indicates that the investigated taxon belongs to Dysoxylum mollissimum (Spreng.) Blume ex G. Don and can be considered an ecological variety of this species.

Keywords: Dysoxylum mollissimum; Flora; New record; Vietnam.

Sources: Dalat University Journal of Science, Volume 15, Issue 2 (2025): 23-30.

Figure 1. Morphological characteristics of Dysoxylum mollissimum (Spreng.) Blume ex G. Don

Notes: (a) Bark; (b) Young branch; (c) Young leaf; (d) Compound leaves; (e) Leaflet (at base of leaf, abaxial surface); (f) Leaflet (adaxial surface); (g) Flower (side view); (h, i) Androecium (cross section); (j) Disk with style; (k) Ovary;

(l) Capsule; (m) Pericarp; (n) Seeds. Source: Photos by Luong Van Dung