Trias
(from treis, three; alluding to the arrangement of the floral envelopes). ORD. Orchideae. This small genus embraces only three species of dwarf, tufted or creeping, stove Orchids; two are natives of Moulmein, and the other inhabits the East Indian peninsula. Sepals sub-equal, spreading, the lateral ones adnate at base with the foot of the column; petals small, oblong or linear; lip slightly spreading at apex, narrow, rather thick; scapes lateral, slender, leafless, one--flowered. Pseudo-bulbs rather small, sub-globose, one-leaved at apex. T. oblonga, probably the only species in cultivation, thrives best in an intermediate house, in small pans of peat and sphagnum, or on blocks with a little peat and sphagnum fastened amongst the roots.
T. oblonga (oblong-leaved). fl. fuscous-green, with a purplish lip; scapes erect, much shorter than the leaves. April. l. small, oblong, acute, coriaceous. h. 3in. Moulmein, 1837.