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Stem to 4 m tall, rarely to 7 m, 12-19 cm diam. Leaves 65-110 cm long, with 120-270 pinnae; petiole 9-36 cm long. Median pinnae 5-17 cm long, 5-7.5 mm wide, narrowed to 4-5 mm at base (65-90% of maximum width), inserted at 45-70° to rachis, often falcate, 7-13 mm apart, often loosely white-tomentose beneath, subglossy, slightly bluish deep green, ±keeled in section with slightly recurved margins. Pollen cones 22-28 cm long, 7-9 cm diam. Seeds 28-33 mm long, 27-30 mm diam.; sarcotesta 2.5-4 mm thick.
Stem to 1.5 m tall, rarely to 2.5 m, 12-20 cm diam. Leaves 70-110 cm long, with 160-260 pinnae; petiole 14-26 cm long. Median pinnae (6-) 7 (-19) cm long, (3-) 4-5.5 mm wide, narrowed to 3-4.5 mm at base (70-100% of maximum width), inserted at 65-85° to rachis, 4-8 mm apart, glabrous or loosely grey-brown-tomentose, glossy mid-green, keeled in section with recurved margins. Pollen cones 25-36 cm long, 8-12 cm diam. Seeds 34-37 mm long, 29-32 mm diam.; sarcotesta 2-3 mm thick.
Stem to 1.5 m tall, rarely to 2.5 m, 12-20 cm diam. Leaves 70-100 cm long, with 160-260 pinnae; petiole 12-35 cm long. Median pinnae 5.5-12 cm long, 3-5.5 mm wide, narrowed to 2.5-3.5 mm at base (65-100% of maximum width), inserted at 65-85° to rachis, 4-9 mm apart, glabrous, glossy mid-green, keeled in section with revolute margins. Pollen cones 18-26 cm long, 6.5-8.5 cm diam. Seeds 28-30 mm long, 26-28 mm diam.; sarcotesta 2-2.5 mm thick.
