Stems solitary or clustered, to 1.5 m tall, to 6 cm diameter, sometimes short and subterranean. Leaves 15; leaf sheaths 12-20 cm long, extended above the petioles into 6-15 cm long auricles; petioles 15-200 cm long, without spines or the proximal ca. half with widely spaced, recurved, brown spines to 1 cm long; blades 26-107 cm wide, split into 5-13 segments, mottled light and dark green, with minute reddish-brown scales abaxially, with straight or slightly curved sides; costas 5.5-17.0 cm long; middle segment deeply split (to apex of costa) into 2 lobes, these wider than the other segments, 16-58 cm long, 10-30 cm wide at the apices, rarely middle segment not split; indentations leading to adaxial folds 0.5-1 cm deep, those leading to adaxial folds 0.2-0.3 cm deep, indentations deeper on lateral segments. Inflorescences 60-70 cm long, becoming recurved below the leaves at or after anthesis; prophylls 6.5-8 cm long; peduncles 18-35 cm long; rachis 0-12 cm long, with 1, rarely 2 partial inflorescences, these branched to 1 order, subtended by broad, flattened, densely brown tomentose, plicate rachis bracts, these splitting laterally and irregularly and deeply tattering; staminate rachillae 2-7 on each partial inflorescence, 9-14 cm long, to 2 mm diameter, densely covered with brown or whitish, branched hairs; floral stalks scarcely developed, solitary or borne in pairs, each subtended by ciliate bracteoles; staminate flower buds 2-2.7 mm long, bullet-shaped; calyces 1.5-2 mm long, 3-lobed at the apices, moderately covered with brown, felty hairs; corollas 2-2.3 mm long, split for ca. half their length into 3 valvate petals, glabrous; staminal rings scarcely developed; filaments free for ca. 2 mm long, alternately long and short; anthers ca. 0.3 mm long; pistillate rachillae 1-4 on each partial inflorescence, 8-24 cm long, to 4 mm diameter, hairy as the staminate rachillae; floral stalks scarcely developed, solitary, each subtended by small, ciliate bracteoles; pistillateflower buds 6-6.2 mm long, ellipsoid; calyces 3.5-4 mm long, briefly 6-lobed at the apices at anthesis, densely covered with felty, brown hairs; corollas 4-5.5 mm long, striate, split for ca. two thirds their length into 3 petals; staminal rings ca. 1.5 mm high, with vestigial filaments; pistils ca. 4 mm long including a 1 mm long style, glabrous. Fruits 0.7-0.8 cm diameter, irregularly globose, red at maturity, epicarp warty.
へのネイティブ, China, Vietnam
Known from China (Guangxi) and northern and central Vietnam (Bac Kan, Ha Giang, Lang Son, Lao Cai, Nghe An, Phu Tho, Quang Ninh, Thua Thien-Hue, Tuyen Quang, and Vinh Phuc) in primary, closed, broad-leaved, evergreen forest on steep mountain slopes on granite or quartzite rocks, less often on limestone, at 100â€“1,000 m elevation. Probably also in Laos.