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Genus :

THRIXSPERMUM

Family :

ORCHIDACEAE

Description


Epiphytic or rarely terrestrial, monopodial herbs. Stems ascending, with closely or well-spaced leaves. Leaf-blades flat, fleshy, base sheathing, jointed. Inflorescence axillary, few to many flowered racemes; floral bracts distichous, persistent. Flowers usually ephemeral, open fully, very variable in size. Sepals and petals subsimilar; lip adnate at base column foot, saccate, usually with a partly hairy or papillose front wall callus, 3-lobed; lateral lobes erect; mid-lobe thick and fleshy. Column short, stout, sometimes winged, with a long foot; pollinia 4, waxy, appearing as 2 unequal masses, subglobose, attached by a common short and broad stipe to a solitary viscidium. Capsule long, slender.

Key to the species

Serial Key Reference
1a. Floral bracts distichous on a flattened rachis T. centipeda
1b. Floral bracts facing all directions on a terete rachis 2
2a. Flowers yellow T. scortechinii
2b. Flowers white T. trichoglottis