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Taxonomic notes on Leycesteria Wall. (Caprifoliaceae): a newly recorded genus for the flora of Vietnam

  • Quang, Bui Hong (Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology) ;
  • Choudhary, Ritesh Kumar (Biodiversity & Palaeobiology Group, Agharkar Research Institute) ;
  • Lee, Joongku (Department of Environment and Forest Resources, Chungnam National University)
  • Received : 2019.01.07
  • Accepted : 2019.05.17
  • Published : 2019.06.01

Abstract

Two species of Leycesteria, L. gracilis (Kurz) Airy Shaw and L. formosa Wall. (Caprifoliaceae), from the Lao Cai and Yen Bai Provinces are reported here as a new generic record for the flora of Vietnam. During floristic surveys of northern Vietnam, L. gracilis and L. Formosa were encountered. A critical morphological study of all the collected specimens and the type of materials consulting the relevant literature led us to confirm the identity of our collected specimens as L. gracilis and L. formosa. The genus differs from other Vietnamese genera of Caprifoliaceae by the presence of a spike inflorescence or flowers in sessile whorls of 6. Taxonomic notes, description, and photographs are provided, together with short notes on the distribution, ecology and phenology of the two species.

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Fig. 1. Map showing the distribution localities of Leycesteria gracilis (X) and L. formosa (√) in Vietnam.

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Fig. 2. Leycesteria gracilis (Kurz) Airy Shaw. A & B. Habit. C. Branchlets. D. Abaxial portion of leaf. E & F. Inflorescence. G & H. Flower but. I. Flower. J & K. Flower view of opened. L. Bracts. M. Anthers. N. Calyx, Ovary & Style. O & P. Infructescence & Fruit. Q. Cross section of fruit. R. Seeds.

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Fig. 3. Leycesteria formosa Wall. A. Habit. B & C. Branchlets. D. Abaxial portion of leaf. E. Inflorescence. F, G, & H. Flower. I & J. Corolla. K. Bracts. L Stamens. M. Anther. N. Ovary and style. O. Berry. P. Calyx. Q & R. Inflorescence fruit and Bracts. S. Detailed view of opened fruit. T. Cross section of fruit. U. Seeds.

Acknowledgement

Supported by : Chungnam National University

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