Brunfelsia undulata Sw.

peduncle very short or wanting; pedicels 8-12 mm long. Flowers showy, calyx cyathiform, ca. 10 mm long, the lobes orbicular, 3-4 mm long; corolla white fading to yellow, sometimes with a small, brownish-purple eye, the tube slender, ca. 10 mm long and 2-3 mm across, pubescent in the lower half within, the limb ca. 1.5 cm across plus the 5, orbicular lobes, 10-15 mm long; filaments pubescent near the point of insertion and below, the anthers narrowly elliptic; stigma semilunar, green. Fruit not known in Panama.