Trichotosia Blume, Bijdr. (1825) 342. Type species: Trichotosia pauciflora Blume
- Genus Trichosia Blume, Tab. Pl. Jav. Orchid. (1825) t. 11 (sphalm.)
- Eria subgen. Trichotosia (Blume) Blume, Mus. Bot. Lugd.-Bat. 2 (1856) 183.
- Eria sect. Trichotosia (Blume) Rchb.f., Bonplandia 5 (1857) 54.
Sympodial epiphytes, occasionally terrestrial in open shrubby vegetation. Rhizomes very short (rarely with elongated rhizomes, not in New Guinea). Stem cane-like, clustered, usually much elongated, not fleshy. Leaves conduplicate, distichous, usually many (rarely few and then spirally arranged, not in New Guinea), deciduous, thin-leathery, articulate with the sheath; sheathing at the base, yellow or red-brown hairy at least on the leaf sheaths. Inflorescence lateral, opposite the leaf, a few- to several-flowered raceme. Flowers small to medium-size, resupinate, widely open or rather closed. Sepals free, usually hairy outside; mentum conical or spur-like. Petals free, almost always much narrower than the sepals. Lip 3-lobed, without spur, not mobile; callus hairy. Column with a column foot; anther terminal, incumbent; pollinia 8, solid; caudicles present; stipe absent; viscidium absent.