A clambering suffrutescent herb up to 13 meters high; stem sub- hexagonal, glabrous or the upper portions puberulous, the hairs minute, curved, confined more or less to the angles; leaf blades oblong- lanceolate, up to 12 cm. long and 3.5 cm. wide, acuminate (the tip itself obtuse or acutish), narrowed at base and briefly decurrent on the petiole, thin, drying dark olive green, glabrous on both sides or the costa and lateral veins (5 or 6 pairs) more or less hirtellous; petioles slender, up to 2 cm. long, glabrous or the channels more or less hir- tellous; capitula mostly terminal, forming short compact thyrsi up to about 2 cm. long and 3 cm. broad, the cymes 3- to 5-parted, the peduncles up to 4 mm. long, flattened, puberulous, the subtending bracts subulate, up to 2.5 mm. long, and 1 mm. wide, connate at base, sparingly hirtellous and ciliolate; cymules borne on hirtellous peduncles about 1 mm. long, the larger outer bracts of the cymule unequal, lanceolate, acute, ciliolate, sparingly hirtellous, the larger bract 14 mm. long and 4 mm. wide at middle, the costa and a pair of lateral nerves predominating, the smaller bract 9 mm. long and 2 mm. wide near base, the costa prominent, the innermost bracts narrowly lanceolate, slenderly acuminate, whitish, ciliolate, the hairs ascending, up to 250 long, the margins hyaline, the larger pair 6 mm. long and 1 mm. wide near base, the smaller pair 4 mm. long and slightly less than 1 mm. wide at base; calyx 5 mm. long, the segments triangular, 3 mm. long and 1.5 mm. wide at base, acute, strongly 3-nerved, ciliolate and densely hirtellous, the hairs ascending, up to 250μ long; corolla pale salmon, finely pubescent, the hairs up to 0.7 mm. long, spreading, a few of them gland-tipped, the tube about 2 cm. long, 2.5 mm. broad at base, narrowed at 5 mm. above base to 1 mm., thence gradually enlarged to 6.5 mm. at mouth, the lips subequal, about 1 cm. long, the upper lip ovate, 7 mm. wide near base, the lower lip oblong, 7 or 8 mm. wide at throat, 3-lobed at apex, the lobes ovate, 2.5 mm. long, 1.5 mm. wide at base, obtuse; stamens reaching the tip of the lips, the filaments flat, glabrous near tip, sparingly and minutely pilose toward base, the hairs spreading or retrorsely curved, up to 550μ long; capsules not seen. Type in the U. S. National Herbarium, No. 1515091, collected at La Sierra, 18 kilometers north of Medellín, Department of Antioquia, Colombia, 2,000 meters altitude, January 1931, by W. A. Archer (No. 1354).