Vanilla borneensis
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Vanilla borneensis is a species of plant in the genus Vanilla ( Vanilla ) in the orchid family (Orchidaceae). It grows as a climbing plant in Borneo .
description
Vanilla borneensis is an evergreen climber. The leaves are at intervals of six to ten centimeters on the shoot, they are elongated oval and pointed at the front. The petiole is 0.5 to 1.5 inches long, the whole leaf measures ten to 15 inches in length and 2.5 to 5.5 inches in width.
The racemose inflorescence is quite short at 2.5 to 5 centimeters and has nine to twelve flowers . The inflorescence axis is zigzag. The bracts are oval to slightly triangular, pointy and up to 1 centimeter long. The ovary has a short stalk, together with the flower stalk it measures 3.5 centimeters. The sepals are silvery green and measure about 3.4 × 1.1 centimeters. The petals are cream-colored, 1.6 centimeters wider, clearly keeled on the outside. The three centimeter long lip is also light and keeled on the outside, it surrounds the column in a tubular shape and is fused with it to a certain extent. The lip is three-lobed with five longitudinal keels, the middle lobe ends bluntly, the edge is wavy, the blade with red markings and a tuft of pointed hair directed backwards. The column is 1.8 centimeters long, white, at the top with two orange appendages, the end is completely enclosed by the lip. The capsule fruit is narrowly linear and 7.5 to eight centimeters long.
distribution
Vanilla borneensis occurs in Southeast Asia from northeast India ( Assam ) via Thailand and Malaysia to Borneo . The type specimen was collected in forests near the river bank in Borneo.
Systematics and botanical history
This orchid was described by Robert Allen Rolfe in 1896 . Vanilla pilifera is a synonym . The description was based on a non-blooming specimen, no further findings are known in the vicinity, so that a comparison of recent collections with the type specimen is difficult.
Within the genus Vanilla , Vanilla borneensis is classified in the subgenus Xanata and there in the section Thethya , which contains all species of the Paleotropic . According to Portères, Vanilla borneensis is similar to Vanilla abundiflora , which also occurs on Borneo , but is not closely related according to Soto Arenas and Cribb . The closest related is therefore Vanilla diabolica from Sulawesi. Furthermore, the leafless species Vanilla aphylla , Vanilla calopogon and Vanilla wightii show similarities with Vanilla borneensis .
literature
- Le Vanillier et la Vanille dans le Monde . In: Gilbert Bouriquet (ed.): Encyclopédie Biologique . tape XLVI . Paul Lechevalier, Paris 1954.
Individual evidence
- ↑ a b c d Roland Portères: Le Genre Vanilla et ses Espèces. In: Le Vanillier et la Vanille dans le Monde. Pp. 169-170, 215-216.
- ↑ a b c d e Miguel A. Soto Arenas, Phillip Cribb: A new infrageeric classification and synopsis of the genus Vanilla Plum. ex Mill. (Orchidaceae: Vanillinae) . In: Lankesteriana . tape 9 , no. 3 , 2010, p. 371 ( ucr.ac.cr [PDF]).
- ↑ a b Rafaël Govaerts (Ed.): Vanilla borneensis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 19, 2020.
- ↑ In: J. Linn. Soc., Bot. Volume 32, 1896, p. 460.