A speciebus omnibus Pinangae Vietnamensibus petalis florum staminatorum apice pilos longos ferentibus, staminibus 4, perianthio florum pistillatorum cupulari et endospermio homogeneo differt.
Vietnam in Kon Tum and Thua Thien-Hue and near Da Nang City.
In lowland or montane rainforest at 200-1400 m elevation.
Stems clustered, rarely solitary, to 2 m tall, 0.4-0.8 cm diam., densely covered with reddish-brown scales. Sheaths closed, forming a crownshaft, 6.5-12 cm long, densely covered with reddish-brown scales; ocreas 1.5-2 cm long; petioles 3.5-6 cm long, green with whitish scales; rachis 11.5-40 cm long; pinnae 2-4 per side of rachis, falcate, not contracted at the bases, middle pinna 10-15 cm long, 1-3 cm wide at the middle, apical pinna 4.5-5 cm long, 2-4 cm wide at the middle, lobed, rarely blade undivided, then blade 21 cm long and 8 cm wide at the middle; veins only slightly raised adaxially. Inflorescences infrafoliar, pendulous; peduncles 0.1-0.2 cm long, 0.2 cm wide; prophylls 5-6.5 cm long; rachis absent; rachilla 1, 3-6.4 cm long, rectangular in crosssection, glabrous; triads distichously arranged; staminate flowers 11 mm long; sepals forming a 3-lobed, flat, membranous calyx, 1.5 mm long; petals 10 mm long, irregularly lobed at the apices, one petal larger than the other two, fleshy, with 2 mm long, hyaline hairs at the apices; stamens 4; pistillate flowers 2.5 mm long; calyx 2.5 mm long, cupular, not split into 3 sepals, ciliate at the apices; corolla similar to the calyx; ovary 2.5 mm long; fruiting calyx briefly and irregularly split at the apices; fruits 1.2-2 cm long, 0.2-0.4 cm diameter narrowly ellipsoid, slightly curved, color unknown; endosperm homogeneous.