Moist or wet forest on the Atlantic slope; 500-1,000 m elevation; often in exposed locations on limestone.
Habit: solitary, erect, to 5 m tall. Stem: 2-3.5 cm diam., green, prominently ringed, internodes 25-35 cm long. Leaves: 3-5, pinnate, erect, ascending, only later spreading; sheath 25-40 cm long, tubular, green, obliquely open apically and there ± pale but with brown ragged margin, slightly glaucous, leathery but drying grayish brown and ± woody, persistent, durable, longitudinally striate-nerved with a rounded ridge extending from petiole; petiole 15-40 cm long, slightly grooved and green above especially toward base, rounded and green and densely glaucous below; rachis 1-2 m long, angled and green above, rounded and green below and densely glaucous; glaucous covering on leaf sheath, petiole, and rachis is ± deciduous and tends to weather away with time; pinnae 50-70 on each side of rachis, 30-35 x 0.5-1.2 cm, narrowly linear to linear-lanceolate, clustered in groups of 2-4, borne in different planes and directions, long-acuminate, gray-green, prominent midrib and several much less prominent primary and secondary nerves on each side of this. Inflorescences: infrafoliar, usually among old leafsheaths, longpedunculate, erect, solitary; peduncles to 50 cm long, ± stout, 7 mm diam. at apex, 1.2 cm diam. at base, erect or downwardarching when heavily laden with fruits, light green in flower, redorange in fruit; bracts 6, prophyll 5 cm long, 2nd bract 7 cm, 3rd II cm, 4th 18 cm, 5th 20 cm, 6th 15-20 cm, uppermost exceeding peduncle, closely sheathing, acute, bifid, fibrous, longitudinally striate-nerved, light brown at anthesis. Staminate with rachis 1020 cm long, obtusely angled, light green in flower; rachillae 15-30, these 25-30 cm long, 2 mm diam., obtusely and longitudinally angled, drooping, light green, minutely and faintly white-spotted. Pistillate with rachis 15 cm long, longitudinally and obtusely angled, green in flower, red-orange in fruit; rachillae 12-30, lower ones the longest, these to 15 cm long, 2 mm diam., ± stiff, erect, spreading, obtusely and longitudinally angled, light green in flower, minutely and faintly white-spotted, red-orange in fruit. Flowers: Staminate 2.5 x 3 mm, depressed-globose, yellow, slightly aromatic, slightly sunken in rounded depressions; calyx 1 x 1.75 mm, lobed, green, sepals imbricate in basal 1/2, triangular and acute apically; petals 2.5 x 2.5 mm, valvate, connate apically and basally and apically adnate to pistillode and corolla opening by lateral slits, acute, lightly nerved on inside; stamens 2 mm high, filaments 0.75-1 mm long, green, anthers 1.5 mm long, oblong, yellowish; pistillode 2.5 mm high, columnar, green. Pistillate in rather lax spirals, 2 x 2 mm, globose, light yellow; calyx 1 x 2 mm, deeply lobed, nerveless, sepals imbricate in basal 1/3, rounded apically; petals 2 x 3 mm, imbricate nearly to apex, acute, nerveless; pistil 2 x 2 mm, globose, greenish, styles short or lacking, stigma lobes short, slightly recurved, barely exceeding petals. Fruits: 7-10 mm diam., globose, black.