A newly described species from Lanyu Island, Taiwan. Pseudostems green, about 2.5 m tall, base not swollen. Leaf blades narrow-oblong, 138-150 cm long, 40 cm wide, rounded and asymmetric at base; petioles 60 cm long, margins erect and basally with wings. Inflorescence subhorizontal, about 46 cm or longer, 1 cm in diameter, densely angled, glabrous, green; spathe green, 27 cm long, 5 cm wide, lanceolate, apex caudate, glabrous; male bracts revolute, persistent, ovate-lanceolate, 6-7 cm long, 3 cm wide, adaxially yellowish-green, lightly pink at their rounded tip, abaxially green. Male flowers 4 per bract in a row, cylindrical, peduncle white, 0.6 cm long, glabrous; compound tepal 2.5 cm long, 1 cm wide, white, 5-lobed, apex of 2 lobes with a short hook-like appendage, inner 3 lobes almost as long as outer lobes or shorter; free tepal membranous, 1.3 cm long, 0.7 cm wide, about half as long as compound petal, boat-shaped, sulcate at outer side, (ovate and cordate at base when pressed), keeled in the central inner side, apex apiculate; stamens 5, anthers white, linear, flat, 1 cm long; filaments white, 1.2 cm long; reduced gynoecium whte, 2.2 cm long; filaments white, 1.2 cm long, not clavate. Fruits 8 per cluster, green, 5.5-7 cm long, 1.5 cm wide, cylindrical, apex bottle-necked, slightly curved, 3-4 angled, glabrous. Seeds numerous, black, irregularly angled, smooth, 0.5 cm in diameter, 0.3 cm thick.
Two small populations in and around a deep ravine
Endemic to Lanyu Island, Taiwan. Only 2 small wild populations in a deep ravine at approx. 50 m alt.