PLANT: Shrubs or small trees 2-9 m tall. LEAVES: simple, mostly alternate, linear to linear-lanceolate, 6-15(-26) cm long, 2-6(-13) mm wide. INFLORESCENCE: terminal racemes or panicles. FLOWERS: with white throat, the outside pink, lavender to magenta; calyx bilabiate, pubescent; corolla tubular-campanulate, glabrous outside, with gland-tipped hairs below stamen insertion, with simple hairs 1-3 mm long in the throat; anthers 2-3 mm long; staminode 4-10 mm long, sometimes with an aborted anther. FRUITS: linear, terete, 13-32 cm long. SEEDS: winged by free or basally fused hairs. NOTES: 1 sp., 2 subspp.; sw U.S.; Mex. (Greek: cheilos = lip + opsis = like - referring to corolla shape). REFERENCES: Mason, Charles T., Jr. 1999. Bignoniaceae. Ariz.-Nev. Acad. Sci. 32(1).