Results 111 to 120 of about 209 (128)
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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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The Rediscovery of Ceratozamia kuesteriana (Zamiaceae) in Mexico
Brittonia, 1982Ceratozamia kuesteriana Regel, which was described from material coming from an unspecified Mexican locality and which, after its description, was never recorded in the field, has been found in southern Tamaulipas.Ceratozamia kuesteriana is very closely allied toC. zaragozae Medellin but differs by not having twisted leaves.
Aldo Moretti +2 more
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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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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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Ceratozamia aurantiaca Pérez-Farr., Gut.-Ortega, J.L.Haynes & Vovides
2022Ceratozamia aurantiaca Pérez-Farr., Gut.-Ortega, J.L.Haynes & Vovides, Taxonomy 1(3): 249–251 urn:lsid:ipni.org:names:77221576-1 Ceratozamia martinezii Mart. -Domínguez, Nic.-Mor. & D.W.Stev., Nordic J. Bot. 1: 2. 2021 [2022]. Type. Mexico. Oaxaca: Mun. San Pedro Teutila, El Faro, 615 m, 28 Sep 2020, L. Mart í nez-Dom í nguez et al.
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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
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Ceratozamia guatemalensis (Zamiaceae): A new cycad species from Mesoamerica
PhytotaxaCeratozamia guatemalensis, a new cycad species from the Sierra de los Cuchumatanes, Huehuetenango, Guatemala, is described and compared with the geographically proximal congeners C. vovidesii and C. matudae, with which C. guatemalensis has been historically confused based on their pendulous seed cones, a rare trait in the genus.
MIGUEL ANGEL PÉREZ-FARRERA +6 more
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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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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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