Vanilla francoisii

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Vanilla francoisii
Systematics
Order : Asparagales (Asparagales)
Family : Orchids (orchidaceae)
Subfamily : Vanilloideae
Tribe : Vanilleae
Genre : Vanilla ( vanilla )
Type : Vanilla francoisii
Scientific name
Vanilla francoisii
H.Perrier

Vanilla francoisii is a species of plant in the genus Vanilla ( Vanilla ) in the orchid family (Orchidaceae). It grows as a climbing plant in Madagascar .

description

Vanilla francoisii is an evergreen climber. The shoot is quite thin with a diameter of 0.4 centimeters, the internodes measure six to eight centimeters. The leaves are two to 2.5 inches long and 0.6 to one centimeter wide. The leaf shape is ovate, narrow and almost pointed. The leaf base is rounded with a very short petiole.

Vanilla francoisii blooms in February. The inflorescence bears three to four greenish-white flowers . The bracts fall off quickly. The ovary is not stalked. Sepals and petals are two to 2.5 centimeters long and 0.6 to one centimeter wide. They are oval in shape, the outer petals are slightly longer and slimmer. The lip is pink at the base and purple at the edge, it forms a tube around the column . The lip is about two inches long and 1.2 inches wide, on top it is densely covered with thick, two-millimeter long hair. The column becomes about one centimeter long, at the front end, next to the stamen , there are two membranous appendages. The capsule fruit becomes six to eight inches long and 0.5 inches in diameter.

distribution

Vanilla francoisii occurs in northeast Madagascar. It grows in forests near the coast, sometimes also epiphytically .

Systematics and botanical history

Vanilla francoisii was first described by Perrier de la Bâthie in 1939 . The name is sometimes also spelled Françoisii .

According to Portères, Vanilla francoisii is similar to the Asian Vanilla annamica and the African Vanilla grandifolia . Within the genus Vanilla , Vanilla francoisii is classified in the subgenus Xanata and there in the section Thetya , which contains all species of the Paleotropic . Soto Arenas and Cribb name Vanilla coursii as the only closely related species. Both species are only known from very few collections, with Vanilla francoisii there are only two herbarium specimens. These plants may also be Vanilla perrieri .

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 d Roland Portères: Le Genre Vanilla et ses Espèces. In: Le Vanillier et la Vanille dans le Monde. Pp. 180-181.
  2. ↑ In: Notul. Syst. Volume 8, 1939, p. 37.
  3. ↑ Rafaël Govaerts (ed.): Vanilla francoisii. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 19, 2020.
  4. ↑ 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. 376 ( ucr.ac.cr [PDF; 692 kB ]).