Suffrutescent plants up to 3 meters high; stems subterete, glabrous, the cystoliths subpunctiform; leaf blades ovate, up to 19 cm. long and 8.5 cm. wide, short-acuminate, broadly cuneate at base or the smaller uppermost blades rounded to obtuse, rather thin, entire or undulate, sparingly pilose above with flaccid, septate hairs 1 mm. long or more, obscurely pilosulous beneath, especially on costa, lateral veins (10 to 12 pairs), and veinlets, these prominent beneath, rather obscure above, the cystoliths slender but prominent under a lens, up to 0.2 mm. long; petioles up to 8 cm. long, glabrous, the cystoliths minute, numerous and parallel; flower-bearing panicles terminal, up to 10 cm. long and about 6 cm. broad, dense to sublax, the stem bearing small axillary, mostly sterile cymes up to 2 cm. long, the branches of the inflorescence subhelicoid, usually once-forked; bracts subtending the branches of the inflorescence ovate to suborbicular, 1 to 1.5 cm. long, about 1 cm. wide, the lowermost acute, the upper rounded and apiculate, rounded and sessile at base, the rachis and rachilla glabrous or rather sparingly pilosulous, the hairs up to 0.3 mm. long, the pedicels up to 3 mm. long, sparingly hirtellous; bracts subtending the flowers lanceolate, about 4 mm. long and 1.25 mm. wide near base, acute; calyx 8 mm. long, glabrous, the segments lanceolate, 7 mm. long, 1.5 mm. wide, acute, faintly 3- to 5-nerved, the cystoliths obscure, the calyces of the sterile lower axillary inflorescences 2 to 3 mm. long; corolla purple, glabrous except the tips of the lips (these hirtellous, the hairs about 0.2 mm. long and ascending), 2.5 cm. long from the base to tip of the upper lip, the tube 3 mm. broad at base, narrowed to 2.5 mm. at 6 mm. above base, 4 mm. broad at mouth, the upper lip linear, 1 cm. long, 1.25 mm. wide, the tip recurved or curled, cucullate and acute, the lower lip spreading, ovate, 1 cm. long, 7 to 8 mm. wide, rounded and 3-lobed at tip, the lobes 0.5 mm. long, 1.5 mm. wide, rounded; stamens exserted 25 mm. beyond the mouth of the corolla, glabrous, the anthers linear, 6 mm. long, 0.5  mm. broad, muticous at both ends; ovary glabrous; mature capsules not seen.
Type in the U. S. National Herbarium, No. 1799125, collected at the Quebrada del Río Hacha, below Gabinete, Cordillera Occidental, Comisaría de Caquetá, Colombia, 2,100 to 2,250 meters altitude, March 23, 1940, by J. Cuatrecasas (No. 8519).