Van Khuong Nguyen

Thu Dau Mot University

39 Novelties in Aspidistra (Asparagaceae, Convallarioideae) with erect stems in the flora of Vietnam: A. quanii, a new species, and A. erecta, a new national record Abstract The paper reports two species of Aspidistra newly discovered in the flora of Vietnam. It includes a description of A. quanii, a species new to science found in the central part...

Three species of the genus Hoya (Apocynaceae, Asclepiadoideae) are newly reported for the flora of Vietnam. One species, Hoya honglenae, is described and illustrated as new to science, and two species, H. acuminata and H. phuwuaensis, are reported as new national records known earlier, respectively, in Bhutan, Bangladesh, NE India, W China, Myanmar...

An unusual species of Phaius discovered in the Da Nang City Area in southern Vietnam is described here as new to science. It is similar to P. hekouensis but can be recognized by the smaller habit, flower color, lip ornamentation, spur, and column characters. The standard taxonomic description, as well as data on its distribution, ecology, phenology...

A new species of Camellia sect. Piquetia (Theaceae), C. hiepii sp. nov. from the Chu Mu Mountains, M'Drak District, Daklak Province, Vietnam, is described and illustrated. The new species is most similar to C. longii Orel & Luu, but differs in having young branches sparsely pubescent, larger leaf blades, more secondary veins, flowers 8-9 cm in diam...

The paper provides a short annotated taxonomic review of Bulbopyllum sect. Tripudianthes from the flora of Vietnam along with a species-level key for identification. The section in Vietnam includes five species, one of which is a new species for science and described under the name, B. viridipallidum. The new species was found recently from Kon Tum...

This paper presents new data on the orchid diversity of Vietnam obtained from field explorations made mainly in 2015–2022, as well as from the study of some historical collections housed at the Herbaria of Russia and Vietnam. It includes descriptions of two species new to science (Coelogyne phitamii and Cymbidium sangii), reports of one genus (Stig...

Parahellenia trongduyii, a new species of Costaceae from Vietnam, is described and illustrated. The new species is similar to P. tonkinensis, but differs in unbranched or barely branched stems, narrowly triangular-lanceolate glabrous buds, bract apex with a soft mucro, yellow to whitish yellow labellum with longitudinal orange to red lines at cente...

This paper presents new data on the orchid diversity of Vietnam obtained in 2015–2021. It contains descriptions of three new species (Cleisostoma furcatum, Malleola micrantha, Schoenorchis hungii), one new variety (Chiloschista parishii var. minutiflora) and one new form (Cleisostoma furcatum forma albiflora). Additionally six species, Ascocentrops...

Begonia kimlongii is described as a new species endemic to Vietnam, from the montane forests of Dak Lak Province. It is mostly similar with Begonia cucphuongensis but can be distinguished by the oblanceolate to obovate leaves, terminal inflorescence with dimorphic bracts and 5-tepaled pistillate flowers. Using IUCN criteria, B. kimlongii is propose...

Gastrochilus pankajkumarii, found in the Central Highlands of Vietnam, is described as a new species for science. The protologue includes color analytical photos of the new species and data on phenology, ecology, and distribution. Morphological comparisons with similar species are presented.

Dendrobium parahendersonii discovered in southern Vietnam is described as new species to science. It belongs to D. sect. Crumenata, and resembles D. hendersonii and D. exile in having a filiform, reed-like stem swollen at the base into a quadrangular ellipsoid pseudobulb and flowering from the leafless part of stem but differs clearly in the detail...

Aspidistra thuongiana is described and illustrated as a new species from the South Central Coast region of Vietnam. The new species has bright yellow flower and a slender pistil with a minute stigma. It is morphologically close to A. longipedunculata, but differs in shorter peduncle, bowl-shaped (vs. campanulate) perigone, shorter ovate (vs. oblong...

The orchid species new for science, Cylindrolobus chienii (Orchidaceae) discovered on Chu Mu Mountain, M'Drak District, Dak Lak Province of southern Vietnam is described and illustrated. It morphologically close to C. gloensis and C. bidupensis but differs from them in glabrous 2-flowered inflorescence, calli on labellum and character of the lip in...