Vanilla andamanica

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Vanilla andamanica
Systematics
Order : Asparagales (Asparagales)
Family : Orchids (orchidaceae)
Subfamily : Vanilloideae
Tribe : Vanilleae
Genre : Vanilla ( vanilla )
Type : Vanilla andamanica
Scientific name
Vanilla andamanica
Rolfe

Vanilla andamanica is a species of plant in the genus Vanilla ( Vanilla ) in the orchid family (Orchidaceae). It grows as a climbing plant on the Andaman and Nicobar Islands .

description

Vanilla andamanica is an evergreen climber. The leathery leaves are elongated to lanceolate, with a long tip at the front. The petiole measures 1 to 1.5 centimeters, the leaf is 14 to 19 centimeters long and 2.5 to 4 centimeters wide.

The racemose inflorescence is multi-flowered, the inflorescence axis is 2 to 3 centimeters long. The bracts are oval to elongated, blunt or somewhat pointed, 0.4 to 0.5 inches long. The ovary and flower stalk together measure 2 centimeters. The petals become 5 centimeters long. The three outer petals ( sepals ) are elongated to lanceolate and almost blunt at the tip. The petals are inverted-lanceolate, slightly narrowed at the base, ending bluntly at the tip. The lip is only very indistinctly lobed. The lower part of the lip forms a tube, the front edge is wavy. The middle lobe is densely covered in front with long hair directed backwards. Three thick, rough veins run along the lip; in the middle there is a place densely covered with branched hair. The column is 3.5 centimeters long and has rounded wings.

distribution

Vanilla andamanica occurs in the Andaman and Nicobar Islands . Due to the small distribution area, the population is considered to be sensitive to disturbances.

Systematics and botanical history

This orchid was described by Robert Allen Rolfe in 1918 after a collection by CE Parkinson.

Within the genus Vanilla , Vanilla albida is classified in the subgenus Xanata and there in the Thethya section , which contains all species of the palaeotropic plants . It is particularly similar to the Southeast Asian Vanilla albida , but has larger flowers and other appendages on the lip. Other related species are Vanilla havilandii , Vanilla montana , Vanilla moonii , Vanilla sanjappae and Vanilla yersiniana .

literature

  • Le Vanillier et la Vanille dans le Monde . In: Gilbert Bouriquet (ed.): Encyclopédie Biologique . tape XLVI . Paul Lechevalier, Paris 1954.

Individual evidence

  1. ↑ a b c Roland Portères: Le Genre Vanilla et ses Espèces. In: Le Vanillier et la Vanille dans le Monde. P. 220.
  2. ↑ a b Rafaël Govaerts (Ed.): Vanilla andamanica. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 18, 2020.
  3. ↑ Eric Hágsater, Vinciane Dumont, Alec M. Pridgeon, IUCN / SSC Orchid Specialist Group: Orchids: status survey and conservation action plan. 1996, ISBN 2-8317-0325-5 , p. 92 ( books.google.com ).
  4. ↑ In: Bull. Misc. Inform. Kew. 1918, p. 237.
  5. ↑ a b Miguel A. Soto Arenas, Phillip Cribb: A new infrageneric classification and synopsis of the genus Vanilla Plum. ex Mill. (Orchidaceae: Vanillinae) . In: Lankesteriana . tape 9 , no. 3 , 2010, p. 366-367 ( ucr.ac.cr [PDF]).