Family Orchidaceae Subfamily Epidendroideae Tribe Gastrodieae
Gastrodieae Lindl., Orchid. Select. 7 (1826) 11. Type genus: Gastrodia R.Br.
Synonyms:
Terrestrials, mycoheterotrophic, without chlorophyll, herbaceous. Rhizome condensed, tuberous, sometimes irregularly constricted at intervals; tubers with several internodes. Roots without velamen. Stem erect, with a few scale-leaves near the base. Leaves scale-like. Inflorescence terminal, racemose, glabrous, with a series of membranous sheaths near the base. Flower usually resupinate. Sepals and petals often partially fused at the base to form a floral tube, or sometimes with only the lateral sepals fused. Lip free, entire or weakly 2- or 3-lobed, without spur; claw present; often with 2 basal calli. Column with or without a distinct column foot, near the base often laterally winged along the front margins, with a pair of apical appendages; anther dorsal, incumbent, hardly or not extending beyond the rostellum, usually flattened dorsoventrally; rostellum transverse, shelf-like; pollinia 2 or 4, sectile or granular, either attached to a common viscidium or to a pair of viscidia; stigma entlre, directly below rostellum or situated near the base of column.
(after Kores &, Molvray 2005)
Tribe Gastrodieae consists of 6 genera: Uleiorchis occurs in Honduras, Panama, Colombia, Venezuela, Peru, the Guianas, and southeastem Brazil, 5 genera are present in tropical Africa, Madagascar, the Mascarene Islands, India, mainland southeast Asia, southern China, Japan, Malesia to Australia and the Pacific islands up to Fiji.
- Kores, P. &, Molvray, M.. Tribe Gastrodieae. In Pridgeon, A.M., P.J. Cribb, M.W. Chase & F.N. Rasmussen (edit.), Genera Orchidacearum 4, Epidendroideae (Part one) (2005) 435
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Gastrodieae
Tribe Gastrodieae in New Guinea contains 3 genera:
Didymoplexiella
Didymoplexis
Gastrodia
ARTIFICIAL KEY TO THE GENERA OF THE TRIBE GASTRODIEAE IN NEW GUINEA
1a. Flowers 2.0-3.5 cm long Sepals connate for most of their length, forming a more or less urn-shaped floral tube. Flora tube continuous or split between lateral sepals. Pollinia 2, sectile == Gastrodia
1b. Flowers less than 1.5 cm long. Sepals connate for less than half their length. Flora! tube, if present, short, usually split between the petals and the lateral sepals. Pollinia 4, granular == 2
2a. Column with a pair of prominent, decurved stelidia lateral to stigma == 367. Didymoplexiella
2b. Column with a pair of teeth near the apex == Didymoplexis
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