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.
Mouretia oblanceolata, discovered in central Vietnam, is described as a new species of the tribe Argostemmateae in the family Rubiaceae. The new species is most similar to Mouretia tonkinensis and M. vietnamensis but differs from them by the following traits: erect to sub-erect habit, abaxially glabrous, obcordate stipules, oblanceolate leaves, 12–16 pairs of lateral veins, terminal, umbrella-like, cymose inflorescences, deltoid calyx lobes, and revolute, deltoid to ovate corolla lobes. The formal description, including color illustrations and basic information of ecology, phenology and conservation status, and a key to all currently known species of the genus are provided here.
Boeica konchurangensis B.H.Quang, D.V.Hai & Mich.Möller, a new species of Gesneriaceae from the Gia Lai Province of Vietnam is described, illustrated, and colour photographs of the species are provided. This new species has an almost actinomorphic corolla and shows morphological similarities with B. porosa, but differs from it by a shorter peduncle, a near‐actinomorphic purple corolla with a distinctly broad campanulate tube and a shorter capsule.
A phytochemical investigation of Solanum torvum led to the isolation of eleven steroidal glycosides, 7), torvoside J (8), torvoside K (9), torvoside L (10), and solagenin 6-O-β-D-quinovopyranoside (11). Their chemical structures were elucidated by 1D-NMR and 2D-NMR data as well as comparison with the data reported in the literature. Moreover, all isolated compounds were evaluated for their cytotoxic activities against SK-LU-1, HepG2, MCF-7, and T24 cancer cell lines. Among them, compounds 1, 3, 7, and 11 exhibited cytotoxicity against all four tested cell lines with IC 50 values ranging from 7.89 ± 0.87 to 46.76 ± 3.88 µM.
We transfer Chirita crassifolia to Primulina as P. crassifolia and provide detailed amended descriptions for this species and for P. quanbaensis, both species found in the karst habitats in the Bat Dai Son mountains in Ha Giang province, northern Vietnam.
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