PLANT: vines with stems with glandular and/or stellate trichomes, annual (rarely perennial farther south in range). LEAVES: lanceolate to broadly or narrowly ovate, 1-6 cm. long, 0.5-3.5 cm. wide, basally cordate to subtruncate, apically acute to acuminate or rarely obtuse. INFLORESCENCE: monochasial. FLOWERS: (1-)2-6; on peduncles 1-8 cm long, the pedicels 3-15 mm long, erect in fruit; bracts linear, inconspicuous; sepals subequal or the inner shorter, ovate, narrowly ovate or lanceolate, 3.5-6.5 mm. long, with long attenuate apices, with only stellate trichomes or stellate and glandular indumentum; corollas subrotate to campanulate, 6-12 mm long, blue, glabrous; stamens unequal, 3.5-7 mm long, included; anthers 1 mm long; ovary subglobose, 1 mm long, 2-locular, glabrous; styles 3-5.5 mm long. FRUITS: capsular, subglobose, 4-5 mm. wide; seeds 1-4, 2-3 mm long, trigonous, semicircular in longitudinal section, minutely areolate and strongly verrucose, minutely winged on the outer 2 margins. NOTES: Cultivated fields, disturbed margins, desertscrub; Pima Co.; 1100-1200 m. (3500-4000 ft.); Sep-Mar; Baja C., Son., Sin., Dgo., Nay., Jal., Ver., s to Arg.; also in Cuba. The species is easily identified when glandular trichomes are present. When lacking glandular trichomes, it still can be distinguished from the other species in nearby Sonora by its clustered few-flowered cymes and lanceolate sepals. REFERENCES: Austin, Daniel F. Southwestern 2006. Convolvulaceae. CANOTIA 2 (3): 79-106.