Bui Hong Quang

Capparis gialaiensis (Capparaceae), a New Species from Vietnam

Capparis gialaiensis Sy, a new species of Capparaceae from Vietnam is described and illustrated. It is morphologically closest to C. longistipitata, but differs in length of thorns, filaments and gynophore, shape of the leaf and shape and size of petals. Color photographs, a table comparing the new species with closely allied species and a key are provided to facilitate species identification.

Cordiglottis longipedicellata (Orchidaceae), a New Species from Vietnam

Cordiglottis longipedicellata Joongku Lee, T.B. Tran & R.K. Choudhary, a new species of Orchidaceae from Vietnam is described and illustrated. It is morphologically most similar to C. pulverulenta, but differs in its floral morphology and in having a longer pedicel. Colour photographs, a table comparing the floral structure of the new species with supposedly closely allied species and a key are provided to facilitate species identification. The present paper is also the first report of the genus Cordiglottis in the Indo-Chinese region.

Dillenia Tetrapetala (Dilleniaceae), a New Species from HonBa Nature Reserve, Vietnam

A new species Dillenia tetrapetala Joongku Lee, T.B. Tran & R.K. Choudhary (Dilleniaceae) is described from HonBa Nature Reserve of the Khanh Hoa province of Vietnam. Detailed illustrations and taxonomic comments are provided along with a table listing the differential characters to the closely similar taxa. Phylogenetic analyses using nrITS region of ribosomal DNA and psbA—trnH intergenic spacer region of chloroplast DNA sequences were also performed and they supported the status of D. tetrapetala as a distinct species. The plant is considered endangered based on the IUCN red list criteria because of its restricted distribution.

Argostemma glabra (Rubiaceae), a New Species from Vietnam

Argostemma glabra Joongku Lee, T.B. Tran & R.K. Choudhary, a new species of Rubiaceae from Khanh Hoa Province of Vietnam is described and illustrated. It is morphologically similar to A. apiculatum, but differs in its creeping habit, 4–6 flowered inflorescence, bigger and triangular bracts, smaller peduncle, bigger and broadly triangular calyx lobes, and non-apiculate and smaller corolla. Color photographs, a line drawing and a taxonomic key are provided to facilitate identification.

Porandra microphylla Y. Wan (Commelinaceae): A new distributional record for Vietnam

Porandra microphylla Y. Wan, is a newly recorded species for the flora of Vietnam. This species was collected from Lai Chau and Vinh Phuc province of the country. Morphologically, P. microphylla is closely related to Porandra scandens D.Y. Hong, but differs by its smaller and abaxially glabrous leaves and oblong or subglobose anthers.

Jasminum vietnamense (Oleaceae), a New Species from Vietnam

Jasminum vietnamense B.H. Quang & Joongku Lee, sp. nova (Oleaceae) from Quang Nam province of Vietnam is described and illustrated. It is morphologically similar to J. adenophyllum, J. fuchsiifolium and J. pierranum, but differs from them by having a comparatively smaller calyx tube, absence of domatia at vein axils of the leaf, and by considerably smaller bracts.

Study on the section Trifoliolata DC. (Jasminum L. - Oleaceae Juss.) in Vietnam

Jasminum L. compcises about 200 species in the world including 5 sections: Jasminum Green, Alternifolia DC., Trifoliolata DC., Primulina Green and Unifoliolata DC. they distributed in tropical and subtropical in South East Asia, Europa, Australia and Africa. Section Trifoliolata DC. was published by De Candolle (1844) with the typus Jasminum didymum G. Forst. and characterized by leaves 3-foliolate, terminal leaflet slightly larger than or equal to lateral leaflets or sometimes, lateral leaflets reduced. There are about 10 species and 5 subspecies in this Section in the world. In Vietnam, there are 1 species and 2 subspecies in section Trifoliolata DC. recorded. In this paper to we introduced Jasminum sinense Hemsl. in sections Trifoliolata DC. as a new record for flora of Vietnam. This species is found in Ha Giang (Pho Bang) and has characteristic of Trifoliolata DC. section such leaves 3-foliolate. Jasminum sinense was closed to Jasminum brevilobum by lateral leaflets reduced, leaves and calyx pilose (different with Jasminum lanceolaria subsp. lanceolaria and Jasminum lanceolaria subsp. scortechinii by terminal leaflet slightly larger than or equal to lateral leaflets, leaves and calyx glabrous). But Jasminum sinense characterized by calyx lobes linear, 1-5 mm long. In this article, we introduce nomenclature, key to species, morphology and illustration, distribution and research specimen of three species of Trifoliolata DC. section ( Jasminum L.) from Vietnam.

Genus Pellacalyx - a new record for flora of Vietnam

In the world, Pellacalyx with 7-8 species distributed in China, Indonesia, Malaysia, Myanmar, Philippines, Thailand. In Vietnam, it is the first time, we confirm genus Pellacalyx distributed in Vietnam, this genus with 1 species Pellacalyx yunnanensis H. H. Hu. In Vietnam, genera Pellacalyx and Carallia are distinguished from other genera of Rhizophoraceae by living form and germination of seeds. The other genera with some important characters as “trees of inland ecosystems; seeds not germinating while attached to parent plant” and Pellacalyx and Carallia with some important characters as “trees or shrubs of coastal mangrove ecosystems; seeds germinating and hypocotyls growing from fruit while attached to parent plant”. Pellacalyx is distinguished from Carallia by some characters: Carallia : Stipules twisted, overlapping; stamens attached to disk. Pellacalyx : Stipules flat, free; stamens attached to mouth of calyx tube. We named Pellacalyx yunnanensis “Duoc bau ruou can” by two main reasons: Living form of the species is the same to Carallia - Duoc can. Calyx urceolate. Some main characters of Pellacalyx yunnanensis : Trees (3-)15 m tall. Branchlets thick, with hairs. Leave opposite or whorled, oblanceolate, oblong or lanceolate, 13-20 ´ 4.5-6.5 cm, secondary veins 8-9 pairs, base cuneate, margin serrulate, apex shortly acuminate. Pedicel ca. 2 cm, glabrous. Calyx urceolate, 6-7 lobes. Petals 6-7, white. Fruit subglobose, ca. 1.5 cm in diam. Seeds numerous, brownish black, oblong.

Canthium simile Merr. & Chun (Rubiaceae), a new species for the flora of Vietnam

The genus Canthium Lamk. ( Rubiaceae ) in the world has about 200 species distributed in tropical, subtropical Asia and Africa. Vietnam has 9 species of this genus [Tran Ngoc Ninh 2005]. During the time to study specimen on this genus in Hanoi herbarium, we found one new species ( Canthium Lamk.) for the flora of Vietnam. The species Canthium simile Merr. & Chun has been discoved from the Vu Xuan Phuong’s of the Institute of Ecology and Biological Resources (HN). Specimens collected from Pu Mat national park, Nge An province. Thus there are 10 species belonging to the genus Canthium Lamk. recorded for the flora of Vietnam. They are Canthium cochinchinense Pierre ex Pitard; C. coffeoides Pierre ex Pitard; C. dicoccum (Gaertn.) Teysm. & Binn.; C. filipendulum Pierre ex Pitard; C. glabrum Blume; C. horridum Blume; C. parvifolium Roxb; C. rheedii DC; C. simile Merr. & Chun; C. umbellatum Wight.