Ceratozamia totonacorum Mart.- Dominguez & Nic.-Mor. Brittonia. 2017.
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https://dx.doi.org/10.3897/phytokeys.100.23152 |
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persistent identifier |
https://treatment.plazi.org/id/5D5221BF-28F4-57F5-A092-A5C48BCDC9E7 |
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treatment provided by |
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scientific name |
Ceratozamia totonacorum Mart.- Dominguez & Nic.-Mor. Brittonia. 2017. |
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13. Ceratozamia totonacorum Mart.- Dominguez & Nic.-Mor. Brittonia. 2017. Figure 3J View Figure 3
Type.
MEXICO. Puebla: Jonotla , 9 Jun. 2015, L. Martínez-Domínguez & F. Nicolalde-Morejón 618 ♀ (holotype: CIB) .
Description.
Stem epigeous, erect and decumbent, 10-45 cm in length, 10-25 cm in diameter. Cataphylls persistent, densely tomentose at emergence, reddish-brown and glabrous at maturity, triangular, apex acuminate, 2-5 × 1.2-2.5 cm at base. Leaves 10-55, descending, 90-265 cm, brown at emergence, with brown pubescence, glabrous at maturity. Petiole terete, straight, 30-70 cm, armed with long and thin prickles, green in adult leaves. Rachis terete, straight, 85-181 cm, armed with prickles, green in adult leaves. Leaflets 11-33, oblong, mostly planar, not basally falcate and occasionally falcate, papyraceous, flat, opposite to subopposite, plane, green, adaxial side glabrous and glaucous, abaxial side glaucous, acuminate apex, symmetric apex, attenuate at base, with conspicuous and light green veins; median leaflets 17-40 × 2.7-4.2 cm, 2-5.6 cm between leaflets; articulations green, 0.5-1.3 cm wide. Polliniferous strobilus generally solitary (1-2), cylindrical, erect, 29-31 cm in length, 5.4-5.6 cm in diameter, greenish- yellow at emergence, yellow with brown pubescence at maturity; peduncle tomentose, light brown, 9-12 cm in length, 1.5-2 cm in diameter; microsporophylls 1.5-2.2 × 1.3-1.8 cm, non-recurved distal face. Ovuliferous strobilus solitary, cylindrical, erect or pendular, 20.5-26 cm in length, 8.5-9.3 cm in diameter, light green and glaucous, with orange to light brown pubescence at emergence, green with yellowish-brown trichomes at maturity, acuminate apex; peduncle tomentose, light brown, 10-11.2 cm in length, 1.3-1.5 cm in diameter; megasporophylls 74-92, 1.6-2.2 × 2.6-3.4 cm, prominent distal face, right angle between horns. Seeds ovoid, sarcotesta whitish-red when immature, cream to light brown at maturity; 3.3-4.0 cm in length, 0.8-1.2 cm in diameter.
Distribution and habitat.
Endemic to Mexico in the Sierra Norte of Puebla mountain region on rocky outcrops in exposed walls up to 80 m at 600-1,050 m (Fig. 8 View Figure 8 ). It inhabits the transition zone between cloud forest and evergreen tropical forest.
Etymology.
The specific epithet makes reference to the Totonaco ethnic group of Santiago Ecatlán in Sierra Norte of Puebla, whose residents use and manage this species in local cultural contexts related to rituals.
Distinguishing features.
This species is distinguished by its petioles with abundant and long, thin prickles, brown leaves at emergence, but the colour disappears in the adult leaves; leaflets are oblong and papyraceous with asymmetric apex. Ovulate strobilus yellowish-green with brown trichomes.
Specimens examined.
MEXICO. Hidalgo: Huehuetla, A. P. Vovides 23 (XAL) . Puebla: Jonotla, F. Nicolalde-Morejón et al. 1948 ♂ (CIB), 1956 (MEXU), 1957 (NY), 1949-1955 (CIB), 1958-1967 (CIB), F. Nicolalde-Morejón et al. 1966 (CIB), L. Martínez-Domínguez & F. Nicolalde-Morejón 619 ♀ (CIB); Pahuatlán, G. Toriz et al. 226 (MEXU); Tlapacoyan, E. Meza P. 14 (XAL) . Veracruz: Tlachichilco, A. Rincón G. et al. 2584 (XAL), 2585 (MEXU, XAL) .
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