Leaves about 1 m. long, the rachis relatively stout, smooth, or aculeolate; pinnae 2-13, narrowly to broadly lanceolate, opposite or alternate, 10-60 cm. long, 1.5-9.0 cm. broad, narrowed abruptly and unequally toward the rachis, acuminate and usually obscurely spinulose-dentate toward the tip. Staminate strobili elongate-cylindrical, 4-15 cm. long, 1.0-2.5 cm. thick, the peduncle stout, 2-12 cm. long; ovulate strobili cylindrical, 5-12 cm. long, 3-4 cm. thick, ferruginous-tomentulose, the peduncle stout, 2-7 cm. long.
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