 |
| Photo Ken Hill
|
 |
| The Cycad Pages
| | Ceratozamia mexicana
| |
- Ceratozamia mexicana Brongn., Ann. Sci. Nat. Bot., ser. 3, 5: 7-8 (1846).
- TYPE: Mexico, from Ghiesbrecht, cult. in Hort. Bot. Parisiensis, 1845, Brongniart s.n. (holo P).
Ceratozamia brevifrons Miq., Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 41 (1848).
- TYPE: description (lecto fide Stevenson & Sabato).
Ceratozamia longifolia Miq., Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 40 (1848).
- Ceratozamia mexicana var. longifolia (Miq.) Dyer, in Hemsl., Biol. Cent.-Amer., Bot. 3: 193 (1884).
- TYPE: description (lecto fide Stevenson & Sabato).
Ceratozamia mexicana var. tenuis Dyer, in Hemsl., Biol. Cent.-Amer., Bot. 3: 193 (1884).
- TYPE: cultivated Hort. Kew, Dyer s.n. (Holo K-3 sheets).
- [Ceratozamia ensiformis hort. ex J. Schust., Pflanzenr. 99: 130 (1932), nom. nud.]
- [Ceratozamia fusca hort. ex J. Schust., Pflanzenr. 99: 132 (1932), nom. nud.]
- [Ceratozamia fuscata hort. ex J. Schust., Pflanzenr. 99: 132 (1932), nom. nud.] ?
- [Ceratozamia intermedia Miq., Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 40-41 (1847), nom. nud.]
- [Ceratozamia longipinnata hort. ex J. Schust., Pflanzenr. 99: 130 (1932), nom. nud.]
- [Ceratozamia ottonis hort. ex J. Schust., Pflanzenr. 99: 130 (1932), nom. nud.]
- [Dipsacozamia mexicana Liebm. ex Dyer, in Hemsl., Biol. Cent.-Amer., Bot. 3: 192 (1884), nom. nud.]
- [Macrozamia breviformis hort. ex J. Schust., Pflanzenr. 99: 130 (1932), nom. nud.]
- [Zamia amplifrons hort. ex J. Schust., in Engl., Pflanzenr. 4(1): 130, 142 (1932), nom. nud.]
- [Zamia atropurpurea Parment. ex Miq., Prodr. Syst. Cycad.: 23 (1861), nom. nud.]
- [Zamia mexicana G. Don f., in Loud., Encycl. Pl., new ed.: 1526 (1855), nom. nud.]
Etymology:
From Mexico.
Historical notes:
Named by French botanist
A. Brongniart
in 1846 from material cultivated in Paris.
Distinguishing features:
Thick, concave and relatively narrow leaflets with attenuate, symmetrical
tips and broad bases.
Distribution and habitat:
Hidalgo, Puebla, San Luis Potosi, Queretero and Veracruz states, Mexico,
widely distributed from low to moderate elevations, from evergreen tropical
forests to cloud forests and mixed deciduous woodlands and a range of
geological substrates.
Conservation status:
Not threatened.
1997 IUCN Red List of Threatened Plants category (I).
Conserved in the Sierra Gorda Biosphere Reserve, Queretero.
Description:
Plants arborescent; stem 50 cm long, stem 20 cm diam.
Leaves 12-20 in crown. New growth emerging mid-green. Leaves light or
bright green or dark green, semiglossy, 100-150 cm long, flat (not keeled) in
section, with 50-150 leaflets; vernation straight; rachis not or slightly
spirally twisted; petiole 20-50 cm long, armed with prickles.
Leaflets not clustered, lanceolate, symmetric, broadest below middle,
falcate, concolorous, thick or leathery; margins flat; median leaflets 20-30 cm
long, 15-40 mm wide.
Pollen cones brown, ovoid-cylindrical, 20-30 cm long, 10-12 cm diam.;
peduncle 10 cm long; 10 mm wide.
Seed cones grey, ovoid-cylindrical, 20-35 cm long, 10-12 cm diam.;
peduncle 12 cm long.
Seeds ovoid, 20 mm long, 18 mm wide; sarcotesta white, aging to brown.
|
|
