Oerst., Vidensk. Meddel. 1861:130, t. 2.1861
A. myriodonta Standl.
Shrub, usually less than 60 cm tall (to much taller elsewhere); stems, petioles, lower leaf surfaces, and exposed parts of inflorescences sparsely granular-puberulent. Petioles 1-1.5 (2.5) cm long; blades ± elliptic to oblanceolate, acuminate, cuneate at base, 18-32 cm long, 6-10.5 cm wide, decurrent on petiole as marginal ribs, glabrous and shiny above, dull and often purplish below (with minute red-orange punctations when held to light), pectinate-dentate, the teeth subulate. Panicles small, terminal, violet, usually less than 4 (to 20) cm long, about as broad as long; pedicels 4-11 mm long, slender; calyx deeply lobed, 2-3 mm long, persistent, the lobes 4 or 5, ovate, acuminate, recurved, with orange pellucid punctations near apex; corolla 4-6 mm long, 4- or 5-lobed to near base, the lobes glandular-punctate near apex, violet-purple outside, light violet inside; stamens 4 or 5, 1.8 2 (4) mm long, somewhat exserted; filaments fused to corolla at base; anthers yellow, equaling filaments, dehiscing laterally, beginning at apex; style simple, slender, 2-4 (5) mm long. Drupes depressed-globose, ca 6 mm diam, purple-black at maturity; seed depressed-globose, 4-5 mm diam, brown. Croat 11156, 14473.
Occasional, in the old forest above the escarpment. Flowers from March to June (sometimes to August). The fruits mature from May to September.
Lundell (1971) reported that the plant may reach a height of 7 m.
Mexico to Colombia. In Panama, known from tropical moist forest in the Canal Zone, Panama, and Darien and from premontane wet forest in Darien.