Herbs up to 70 cm. high; stems erect or ascending, quadrangular, narrowly winged, pilosulous or the internodes glabrescent; petioles up to 3 cm. long; leaf blades ovate, up to 15 cm. long and 9 cm. wide, obtuse or rounded at apex, abruptly narrowed at base and decurrent on the petiole, repand-crenate, both surfaces sparingly hirsute or glabrescent; flowers borne in an interrupted spike of verticillasters, the lowermost short-pediceled; bracts small, lanceolate, or those sub- tending the lower verticillasters leaflike; bractlets subulate, 1 to 3 mm. long; calyx segments subulate, about 15 mm. long, pilose and ciliate, the hairs up to 1 mm. long; corolla lavender or purplish pink, up to 5 cm. long, finely pubescent, the throat narrowly campanulate, 1.5 to 2 cm. in diameter at mouth, the limb about 3 cm. broad; stamens included; style glabrous; capsules cylindric, 2 to 2.5 cm. long, slightly flattened, glabrous or a few minute hairs on the calluses; seeds 20 or more, lenticular. VERNACULAR NAME: Oreja de mula (Bro. Elias 247; 988). The name obtusa alludes to the obtuse or round-tipped leaf blades. Thickets, roadsides, waste places in general. Grows at low altitudes, usually below 300 meters. ATLANTICO: Barranquilla, Bro. Paul C11 (US). Vicinity of Galapa and Baranoa, Dugand & Jaramillo 3250 (US). Hacienda El Paraíso on the Río Magdalena between Palmar de Varela and Ponedera, Dugand & Garcia-Barriga 2539 (US). Puerto Colombla, Pennell 12047 (GH, NY, US); Dugand & Jara- millo 3242 (US); Bro. Elius 988 (US). Hacienda Cachubana, Usiacurf, Dugand & Garcia-Barriga 2369 (US); 2383 (US); Bro. Elias 247 (US). Without definite locality, Bro. Eliass, n. (NY). BOLÍVAR: Calamar, Pennell & Rusby 18 (NY). Juana Sanchez Trail, Island of Mompos, Lands of Loba, Curran 264a (US). Turbaco, Killip & Smith 14212 (NY, US); Pennell 4764 (GH, NY). MAGDALENA: Vicinity of Fonseca, Haught 4348 (US). SANTANDER: Puerto Wilches, Rusby 4799 (NY