Shrub or tree to 3 m tall; twigs finely tomentose and appealing granular, with sessile or erect, subechinoid or dendritic hairs, glabrescent. Leaves to 15 cm long, lanceolate, narrowed at base and apex, mostly widest at or below the middle, margins slightly revolute, pubescent above and beneath with sparse, minute, sessile, echinoid hairs, mostly drying dark above; petioles 5-10 mm long grading into the leaf base; minor leaves sometimes present, mostly caducous. Inflorescence terminal, often lateral or opposite the leaves in fruit, an erect panicle 5-8 cm long, the peduncle glabrescent, branching 2 or 3 times from a central axis, elongating in fruit; pedicels filiform, 10 mm long, dispersed pubes-cent with a conspicuous, discoid swelling on the peduncle at its basal articulation. Calyx 3-5 mm long, broadly cupuliform, subtruncate with small narrow teeth which enlarge as the sinuses split during corolla egress, sparingly pulverulentous outside; corolla purple, farinaceous outside, ca. 15 mm across, deeply lobed;
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filaments glabrous, the anthers elongoid or tapering slightly, 5 mm long, opening by large terminal pores which dry with conspicuous yellow rims; ovary and the style glabrous. Fruit globose, 6-8 mm across, purplish black (Holm & Iltis 142 (MO), Costa Rica).