Pscuderanthemum dawei Turrill, Kew Bull. 1920: 69. 1920. Type in the Kew Herbarium, collected in the Cauca Valley, Colombla, July 5, 1920, by M. T. Dawe (No. 847). Isotypes in the U. S. National Herbarium (No. 142565) and the herbarium of the New York Botanical Garden. An erect herb; tips of the stems sparingly hirsute, the hairs about 0.25 mm. long, arranged more or less in two rows, the cysotoliths sub- punctiform, inconspicuous; leaf blades oblong-elliptic, 8 to 16 cm. long, 2.5 to 5.7 cm. wide, slenderly acuminate (the tip itself blunt, more or less curved), narrowed at base and decurrent on the petiole, the upper surface glabrous, bearing subpunctiform cystoliths conspicuous under a lens, the costa (impressed) and lateral veins (about 9 pairs) rather prominent, the lower surface glabrous except costa and veins, these prominent and sparingly puberulous, the hairs curved, the cystoliths less abundant and conspicuous than those of the upper surface; petioles (unwinged portions) up to 1.2 cm. long, the channel sparingly puber- ulous, glabrous beneath; flowers one to several, borne in fascicles in sparingly branched terminal panicles about 16 cm. long and 12 cm. broad, the peduncles up to about 8 cm. long, the lower internode 1 to 1.5 cm. long, the others successively shorter toward the tips of the panicle, both peduncle and rachises more or less flattened, sparingly puberulous, the hairs curved; bracts linear-lanceolate, acute, gla- brous or nearly so; bractlets minute, linear-lanceolate, barely 1 mm. long; calyx segments lanceolate, 2.5 mm. long, 0.5 mm. wide at base, puberulous, 3-nerved; pedicels up to 2 min. long, puberulous; corolla purplish, 7 to 8 mm. long, puberulous, some of the hairs glandular, the tube 1.5 mm. broad at base, 2.3 mm. broad at mouth, the lobes subequal, elliptic-ovate, 2.5 to 3 mm. long, 1.5 to 2 mm. wide, rounded at tip, sta- mens attached at about the middle of the corolla tube, the filaments about 0.5 mm. long, the anthers 1 mm. long, the staminodes subulate, about 0.25 mm. long; ovary cylindric, about 1.5 mm. long, minutely puberulous; style 3 mm. long, the lower portion puberulous; capsules not seen. Usually found in wooded ravines or in dense, damp woods of moun- tain slopes between 1,400 and 1,800 meters altitude. The flowering season extends from June to August. Killip notes that the corollas are purple-red (No. 5692). Lehmann gives the following field note: "Weed with thin weakly ramified stems up to 1 meter in height. Leaves thin, skinny, dark green, with a greasy sheen. Flowers white, softly washed with lilac violet." EL VALLE: La Cumbre, Killip 5692 (US). Roldanillo, Lehmann 8534 (K).