A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam Dang, Van-Son Naiki, Akiyo Phytotaxa 2023 2023-01-26 581 1 1921 1935 3SCNC Pit. (1924: 374) Pit. 374 1924 [178,594,626,653] Magnoliopsida Rubiaceae Lasianthus Plantae Gentianales 95 Tracheophyta species lecomtei   Type:—  VIETNAM. Da Nang City,  18 November 1911,  Lecomte& Finet1316( holotypeP! [P02285240]).   Specimensexamined:—  VIETNAM. Central: Lam Dong Province, Lac Duong District,  1700–1850 melev.,  15 March 1997,  L. Averyanov, N. Q. Binh,  N. V.Duy, P. K. Loc, VH2628(P); Gia Lai Province, Kon Ka Kinh National Park,  1000–1200 melev.,  24 March 2021,  Dang V.S., Truong B.V.& Le T.K.N., Dang428( VNM); in the same location, Kon Ka Kinh National Park,  1320 melev.,  25 March 2021,  Dang V.S.& Truong B.V., Dang428bis( VNM).   Distribution:—Endemic to Vietnam(currently known as Da NangCity, Gia Lai Province, and Lam Dong Province).  Habitat & Ecology:—Growing under a canopy of the evergreen montane forest at 1000–1400 melev. It is found in the natural habitats where dominated by species of Rubiaceae, Euphorbiaceae, Fagaceae, Fabaceae, Lauraceae, Sapindaceae, Phyllanthaceae, Ericaceae, Rutaceae, Meliaceae, and Symplocaceae.  Phenology:—Flowering and fruiting from February to September.  Vernacular name:—Xú hưƠng lecomte.  Notes:—  Lasianthus lecomteiwas described as new from a Vietnamese specimen by Pitard ( Lecomte & Finet 1316). It is characterized by having ovate to oblong-lanceolate leaves, secondary veins 6–9 on each side of midrib, bracts linear and 7–10 mmlong, calyx lobes 4, and fruits ellipsoid, pyrenes 4.   Lasianthus lecomteiis similar to  L. schmidtiiK.Schum. (1902: 340)(synonym:  L. kerriiCraib [1911: 396]) which was distributed in China, Thailand, and Vietnam, but differs from the latter in having ovate to oblong-lanceolate leaves (vs. oblong to elliptic-lanceolate), apex acuminate to caudate (vs. apex acuminate) and styles 8 mmlong (vs. 3 mmlong). [219,1166,666,688] 1911-11-18 Lecomte & Finet Vietnam City 95 1 Da Nang holotype 1997-03-15 2021-03-25 1997-03-15 VNM L. Averyanov & N. Q. Binh & N. V. Duy & P. K. Loc & Dang V. S. & Truong B. V. & Le T. K. N. & Dang Vietnam Lac Duong District 1775 Dang Kon Ka Kinh National Park 95 1 Lam Dong