Trunk cylindric, sometimes branched, to 8 m × 60 cm, apex not tomentose; bark gray, smooth toward base of trunk, with fine, longitudinal fissures. Leaves 20-50(-60), 1-pinnate, 50-120 ×15-35 cm; petiole subterete, 10-25 cm, with 25-50 spines along each side; leaf blade oblong to elliptic-lanceolate, strongly "V"-shaped in cross section, recurved, pale brown tomentosewhen young; leaflets in 50-70 pairs, horizontally inserted at 45-50° above middle of rachis, glaucous when mature, 8-18 cm × 6-8 mm, leathery, densely pubescent when young, midveinflat adaxially when fresh (but sulcate when dry), prominent abaxially, base decurrent, margin ± revolute, apex acuminate, pungent. Cataphylls lanceolate, 3-5 × 1-1.5 cm, densely pale brown tomentose adaxially, apex acuminate, pungent. Pollen cones and megasporophylls unknown.
Home