Ceratozamia huastecorum

Description. Stem 20 - 50 cm long, 14 - 20 cm in diameter, semi-hypogeous, erect and decumbent. Cataphylls 3.0 - 4.0 x 2.5 - 3.0 cm wide at the base, persistent, triangular, reddish brown, densely brown tomentose at emergence, glabrous at maturity, apex acuminate. Leaves 4 - 7, 50 - 80 cm long, ascending, light green at emergence with whitish gray trichomes, glabrous at maturity. Petiole 20 - 40 cm long, terete, linear, green in mature leaves; with 10 - 30 thin prickles 0.21 - 0.35 cm long. Rachis 40 - 70 cm long, terete, linear, green in mature leaves, with prickles. Leaflets 8 - 18 pairs, opposite to subopposite, insertion in one plane, oblong, in general longitudinally planar, not basally falcate, coriaceous, flat, green with adaxial side glabrous and abaxial side glaucous, distal end with entire margins, acuminate and asymmetrical at the apex, attenuate at base, with prominent and light-green veins; median leaflets 12 - 22 x 2.5 - 6 cm, 1.6 - 5 cm between leaflets; articulations 0.4 - 1.1 cm wide, green. Pollen strobili 15 - 18 cm long, 2.5 - 3.2 cm in diameter, solitary, cylindrical, erect, yellowish green at emergence, yellowish cream with blackish trichomes at maturity; peduncle 6 - 23 cm long, 1.6 - 2.2 cm in diameter, tomentose, brown; microsporophylls 0.8 - 1.2 x 0.72 - 1.0 cm, discoid with a non-recurved distal face and a lobate fertile portion, infertile portion 0.28 - 0.35 cm long and orbicular with straight horns 0.11 - 0.18 cm long, 0.50 - 0.68 cm and an acute angle between the horns. Ovulate strobili 13.5 - 18 cm long, 6 - 10 cm in diameter, solitary, cylindrical, erect, green at emergence, dark green with abundant blackish trichomes at maturity, acuminate apex; peduncle 3 - 8 cm long, 1.0 - 2.2 cm in diameter, erect, tomentose, brown; megasporophylls 54 - 99, 9 - 10 orthostichies with 6 - 9 sporophylls per orthostichy, 1.4 - 1.8 x 1.8 - 2.0 cm, with a truncate distal face, horns straight and 0.40 - 0.56 cm long, 1.0 - 1.60 cm between the horns with an acute angle between the horns. Seeds 1.1 - 1.5 cm long, 1.0 - 1.2 cm in diameter, ovate, sarcotesta light brown at maturity.