Results 181 to 190 of about 1,693 (224)
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Phytotaxa, 2023
The recent publication of a monograph on Ceratozamia promised greater taxonomic understanding in the genus. Instead, the plethora of inaccuracies and inconsistencies therein undermined taxonomic cohesiveness.
Jody L. Haynes
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The recent publication of a monograph on Ceratozamia promised greater taxonomic understanding in the genus. Instead, the plethora of inaccuracies and inconsistencies therein undermined taxonomic cohesiveness.
Jody L. Haynes
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A Chemotaxonomic Study of Mucilages in American Zamiaceae
Giornale Botanico Italiano (Florence, Italy: 1962), 1994Abstract Methylrhamnose, fucose, rhamnose, mannose, arabinose, galactose, and glucuronolactone are the monosaccharides identified in hydrolysed mucilages collected from 37 species belonging to the five American cycad genera (Ceratozamia, Chigua, Dioon, Microcycas and Zamia).
SINISCALCO GIGLIANO, GESUALDO +2 more
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Distribution and Variation of Dion Edule (Zamiaceae)
Brittonia, 1982Dion edule is distributed through the Sierra Madre Oriental from Veracruz to Nuevo Leon and in dijunct stations in Tamaulipas. The most significant variation consists in the reduction of leaflet width from the south northwards. On this basis, two varieties are recognized:D. edule var.edule, characterized by wide leaflets and a distribution in Veracruz,
DE LUCA, PAOLO +2 more
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Taxonomic revision of the genus Dioon (Zamiaceae)
Phytotaxa, 2020Cycads are a group of plants in the order Cycadales, comprising ten genera, and with a worldwide distribution. Very few taxonomic revisions are available for the genera in this order, and the present one is intended to provide a revision of the current knowledge in the genus Dioon.
Hernández-Tapia, Jessica E. +2 more
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What is Ceratozamia brevifrons (Zamiaceae)?
Brittonia, 2012The taxonomic status of the Mexican cycad Ceratozamia brevifrons is reassessed based on information from habitat, herbaria and living collections in the Botanic Garden ‘Jardin Botanico Francisco Javier Clavijero.’ Comparison of gross morphology of C. brevifrons with that of C.
Andrew P. Vovides +3 more
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Plant Species Biology
Genetic diversity is the most widely used indicator to evaluate the evolutionary potential of a species. In theory, species with limited distribution are more susceptible to diversity loss.
Pablo Octavio-Aguilar +3 more
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Genetic diversity is the most widely used indicator to evaluate the evolutionary potential of a species. In theory, species with limited distribution are more susceptible to diversity loss.
Pablo Octavio-Aguilar +3 more
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A New Species of Encephalartos (Zamiaceae) from Tanzania
Journal of East African Natural History, 2007Encephalartos kanga sp. nov. is described from Mount Kanga, an isolated hill of the Nguru Mountains within the crystalline, Precambrian Eastern Arc Mountains of Tanzania. The new species is distinguished by its spinose distal leaflet-shoulders with otherwise entire median leaflet margins and by the sharply tuberculate-dentate proximal side of the ...
Pocs, T, Luke, Q
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Monosaccharide composition of the mucilages in Encephalartos Lehm. (Zamiaceae)
Giornale botanico italiano, 1981Abstract Arabinose, fucose, galactose, mannose, methylrhamnose and rhamnose were identified in the hydrolysed mucilages of 14 Encephalartos species. The monosaccharides occur in quantities varying between 44% (w/w) in E. hildebrandtii and 89% (w/w) in E. tegulaneus. Galactose, arabinose and rhamnose are the most abundant monosaccharides.
Moretti A. +2 more
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Ceratozamia popolucana (Zamiaceae): A new species from Los Tuxtlas, Veracruz, Mexico
PhytotaxaCeratozamia popolucana sp. nov., a newly discovered cycad species from Los Tuxtlas Biosphere Reserve, Veracruz, Mexico, is described and compared with its congeners.
M. A. Pérez‐Farrera +6 more
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A new Zamia (Zamiaceae) from Colombia
Brittonia, 2018Zamia lindosensis, a species of cycad from sandy soils of Amazonas, Colombia, is described and illustrated. It is compared to Zamia amazonum, which has similar habitat requirements, petiole morphology and prickles, leaflet margins, and strobili but with very narrow leaflets.
Dennis Wm. Stevenson +2 more
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