Shrubs 1-2 m tall; stems subquadrangular, sometimes swollen at the nodes in young portions, glabrous. Leaves elliptic to elliptic obovate, 10-21 cm long, 2.5-7 cm wide, apically acuminate, basally attenuate, drying dark green above, lighter green below, cystoliths present but obscure, glabrous, gland dotted be-low, the margins entire to undulate; petioles 1-2.5 cm long, glabrous. Inflores-cences in terminal spikes to 9 cm long, 1.5-3 cm wide, borne singly and in pairs; peduncles to 7 cm long, glabrous; rachis glabrous to puberulous; bracts white to green or purplish, imbricate, elliptic to elliptic oblong, to 2.5 cm long, 1.25 cm wide, apically acute, 10-12 veined, glabrous, minutely gland dotted, the mar-gins serrulate toward the tip with teeth ca. 0.25 mm long; bracteoles narrowly lanceolate, to 7.5 mm long, 1 mm wide at the base, glabrous. Flowers with the calyx segments lanceolate, apically acuminate, glabrous, the posterior segment to 4.25 mm long, 1.5 mm wide, lateral segments to 4 mm long, 0.75 mm wide, anterior segments to 4 mm long, 1.0 mm wide; corolla with white tube and lav-ender lobes, the tube cylindrical, 3-3.8 cm long, 5-9 mm wide, apically obtuse to rounded; stamens inserted ca. 2 cm above the base of the tube, filaments 1 mm long, pilosulous; anthers 2.5 mm long, 0.5 mm broad, apically adherent. Capsules clavate, 11 mm long, 4.5 mm broad, 3 mm thick, minutely punctate, glabrous; seeds ovate, 4 mm long, 3 mm broad, dark brown when dry.
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