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A New Species of Ceratozamia (Zamiaceae, Cycadales) from Chiapas, Mexico
Novon, 1999 A new species of cycad, Ceratozamia alvarezii (Zamiaceae) from Chiapas, is described and illustrated. This species has affinities with C. matudai from Chiapas and C. sabatoi from Quere- taro and Hidalgo. It differs from these species with regard to trunk, leaf habit, and male and female cones. It differs from C.
Andrew P Vovides +2 more
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A New Species of Ceratozamia (Cycadales, Zamiaceae) from Veracruz, Mexico
Novon, 2008 Ceratozamia decumbens (Zamiaceae, Cycadales) is newly described and illustrated. This species, endemic to Veracruz, has affinity with C. morettii Vazquez Torres & Vovides, but differs in leaf morphology and leaflet habit as well as in the microsporangiate and megasporangiate strobili and trunk.
Andrew P Vovides +2 more
exaly +3 more sources
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Another new species of Ceratozamia (Zamiaceae) from Chiapas, Mexico
Botanical Journal of the Linnean Society, 2001Ceratozamia mirandai sp. nov. from the Sepultura Biosphere reserve of Chiapas, Mexico, is described and illustrated. Its closest affinities are with C. kuesteriana Regel from Tamaulipas of north-east Mexico, but differs in male and female cone and trunk morphology.
Andrew P Vovides +2 more
exaly +3 more sources
Evolution of Ceratozamia cycads: A proximate-ultimate approach
Molecular Phylogenetics and Evolution, 2019Evidence suggests that past climatic fluctuations affected speciation of extant cycads. However, empirical genetic and morphological evidence explaining patterns and processes of species diversification are scarce. There are some explanations for the origin and evolution of the genus Ceratozamia, but with inconclusive results.
Anwar, Medina-Villarreal +2 more
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Botanical Gazette, 1912
1. Ceratozamia mexicana grows best in well shaded mesophytic conditions. 2. Any individual in passing from the seedling to the adult stage shows such a progressive change in its leaves, the leaflets becoming larger, broader, thicker, and more numerous, that descriptions of species based largely upon leaves are open to suspicion. 3.
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1. Ceratozamia mexicana grows best in well shaded mesophytic conditions. 2. Any individual in passing from the seedling to the adult stage shows such a progressive change in its leaves, the leaflets becoming larger, broader, thicker, and more numerous, that descriptions of species based largely upon leaves are open to suspicion. 3.
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Brittonia, 1986
Ceratozamia euryphyllidia from Veracruz is described and illustrated. This species differs from all others in the genus in its very large, broad leaflets (9–16 cm wide) which have undulate margins, prominent veins, and a membranous to translucent texture at maturity.
Dennis Wm. Stevenson +2 more
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Ceratozamia euryphyllidia from Veracruz is described and illustrated. This species differs from all others in the genus in its very large, broad leaflets (9–16 cm wide) which have undulate margins, prominent veins, and a membranous to translucent texture at maturity.
Dennis Wm. Stevenson +2 more
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A New Species of Ceratozamia (Zamiaceae) from Chiapas, Mexico
Brittonia, 1982Ceratozamia norstogii sp. nov. from Chiapas, Mexico is described. This species is distinct from all others in the genus in that it has a straight rachis with very narrow leaflets (3–10 mm wide) which are strongly curved and almost round in cross section when dried. It is known only from Chiapas, Mexico and in cultivation.
Dennis Stevenson, Stevenson Dennis Wm
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Seed Coat Anatomy of Ceratozamia mexicana (Cycadales)
The Botanical Review, 2004I. Abstract The seed coat furnishes protection with a thick cuticle, tannin cells, mucilage, and a hard sclerotesta. The external layer of the seed coat is a sarcotesta; a thick cuticle covers the external walls of its epidermal cells. This epidermis bears stomates and, in the early stages, trichomes. The subepidermal cells have druses.
María Ydelia Sánchez–Tinoco +1 more
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Range and Variation in the Genus Ceratozamia (Zamiaceae)
The Botanical Review, 2004I. Abstract The genus Ceratozamia has an extensive distribution that starts in northeastern Mexico and continues southward and southeastward into Guatemala, Belize, and Honduras. Over this extensive distributional range Ceratozamia is found in numerous disjunct populations.
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A New Species of Ceratozamia (Cycadaceae) from San Luis Potosi
Brittonia, 1979A new species ofCeratozamia (Cycadaceae) from San Luis Potosi, Mexico is described. This species differs from all others in the genus by the clustering of leaflets along the rachis.
Garrie P. Landry, Marcia C. Wilson
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