Siphonoglossa

Undershrubs or herbs. Leaves opposite, petiolate, entire. Inflorescence axillary, solitary flowers or dichasial cyme; bracts and bracteoles linear. Calyx regular, sparsely hairy; tube shorter than lobes, lobes 4 or 5, linear-lanceolate. Corolla 2-lipped, glabrous or hairy; upper lip linear-oblong, entire or 2-fid, rugula distinct; lower lip 3-lobed, with middle lobe ovate, and lateral lobes oblong; aestivation ascending; tube long, narrowly cylindric. Androecium: fertile stamens 2, arising in mouth or throat of corolla tube, exserted; filaments linear; anthers 2-thecous; thecae superposed, tailed or muticous; staminodes 0. Pollen prolate, 2-colporate, with pseudocolpi; surface reticulate. Disc deeply cupular, with V-shaped slit, with 2 awns. Gynoecium: ovary +/- ellipsoid, with 2 ovules in each locule; style terete, long-filiform, running in rugula, exserted; style branches 1 or 2, ventral lobe more developed, cylindriform. Capsule oblong, slightly beaked, stipitate, with inelastic placental bases. Seeds obovate; surface rough and convolute or rugose. x = 11 (14) (polyploidy).