Pseudovanilla

Pseudo Vanilla foliata

Pseudo Vanilla is a genus of the orchid family ( Orchidaceae). It contains eight species of herbaceous plants that are native to Southeast Asia and Australia.

Description

The species of the genus Pseudomonas Vanilla are terrestrial growing climbing plants. The scion is hairless, round in cross section, at each node originates a root. The roots can be thickened club-shaped, sometimes they are branched. The scion is yellowish to orange in young plants, in older it turns green. Leaves are missing, they are reduced to scale-like leaves down. Particularly at the base of flowering shoot parts they can also be enlarged and formed almost leaf-like foliage. Young plants are strong mykoheterotroph, older assimilate limited itself

The inflorescence is a panicle and carries up to 150 resupinierte flowers. The flowers are greenish to yellow, the lip is stronger and contrasting colored. The petals are not fused together, something meatier texture, widely spread out. Sepals and petals are formed about the same, the petals are slightly narrower. The lip is a bit grown far with the column and forms with it a nectary. The front part of the lip is rounded, spread, with a wavy margin. The lip is decorated with different hairs and papillae, run down the middle two fleshy keels. The column is bent, short, thin, forward to slightly thickened, it is hairless. The stamen is hardly tissue of the column ( Klinandrium ) surrounded, it is hood -shaped, slightly bent down quadrangular in outline, with respect to the column axis. The stamen is unclear zweikammrig, the two pollinia are in turn divided into two, they are of grainy powdery consistency. The capsule fruit is oblong, it contains numerous seeds. These are 1.7 x 1.3 millimeters in size, flat, winged ring around the globular embryo. The wing is deeply incised on one side, so that the seed is similar in outline about a lily pad.

Dissemination

Pseudo Vanilla is in Indonesia, distributed in New Guinea, the Philippines, some islands of the Pacific and northeastern Australia. The individual species have a narrowly limited area, respectively. The sites are located in damp, shady places, all species grow on very rich soils or on rotting wood.

Systematics and botanical history

Pseudo Vanilla is classified within the subfamily Vanilloideae in the tribe Vanilleae. The most closely related genus is Erythrorchis, sister group to these two genera is Cyrtosia.

Pseudo Vanilla was first described in 1986 by Leslie A. Garay. The name comes from the Greek pseudo Vanilla ψεῦδος pseudo, " wrong" and the generic name Vanilla, he refers to the superficial resemblance to the genus Vanilla. The species of the genus Pseudomonas Vanilla known before Garays publication, however, counted to other genera ( mainly Galeola, but also vanilla and Erythrorchis ).

The following eight species are counted to the genus Pseudomonas Vanilla:

• Pseudo Vanilla affinis ( J.J.Sm. ) Garay - Java
• Pseudo Vanilla anomala (Ames & LOWilliams ) Garay - Viti Levu
• Pseudo Vanilla foliata ( F.Muell. ) Garay - New Guinea and Australia
• Pseudo Vanilla gracilis ( Schltr. ) Garay - New Guinea to Solomon Islands
• Pseudo Vanilla philippinensis ( Ames) Garay - Luzon
• Pseudo Vanilla ponapensis ( Kaneh. & Yamam. ) Garay - Pohnpei
• Pseudo Vanilla ternatensis ( JJSm. ) Garay - Ternate, Moluccas
• Pseudo Vanilla vanilloides ( Schltr. ) Garay - Guinea

Documents

The information in this article come from mainly:

• Jim B. Comber: Orchids of Java. Bentham - Moxon Trust, Kew, 1990, ISBN 0-947643-21-4, page 74
• Leslie A. Garay: Olim Vanillaceae. In: Botanical Museum Leaflets (Harvard University). 30, 1986, pp. 234-236 ( http://www.botanicus.org/page/961970 ).
• Alec M. Pridgeon, Phillip Cribb, Mark W. Chase and Finn Rasmussen ( ed.): Genera Orchidacearum. Orchidoideae (Part 2). Vanilloideae. 3/2, Oxford University Press, New York and Oxford 2003, ISBN 0-19-850711-9, pp. 319-321.

Furthermore, quoting: