Results 31 to 40 of about 1,784 (192)

Fighting their last stand? A global analysis of the distribution and conservation status of gymnosperms [PDF]

, 2015
Aim: Gymnosperms are often described as a marginal and threatened group, members of which tend to be out-competed by angiosperms and which therefore preferentially persist at higher latitudes and elevations.
Bigras, Bond, Bowe, Brodribb, Carlquist, Cernusak, Chaw, Coiffard, Collen, Connor, Coomes, Coomes, Davies, Debreczy, Eckenwalder, eFloras, Enright, Ewers, Farjon, Farjon, Farjon, Feuerer, Fridley, Friedman, Gerstner, Gibson, Hastie, Henschel, Hill, Hillebrand, IUCN, Jablonski, Jenkins, Jones, Kozlowski, Kramer, Kreft, Leslie, Lomolino, Lusk, McCain, McCoy, Meyer, Mittelbach, Motomura, Mutke, Pimm, Purvis, Pärtel, R Core Team, Ran, Robinson, Rohde, Roskov, Rumeu, Rybicki, Safi, SAS Institute Inc, Sax, Soltis, Soltis, Sperry, Sperry, Stoffel, Takhtajan, Tang, Tredici, Visser, Wang, Willert, Willert, Williams, Wood, Wood, Wood, Wright, Zhao   +76 more
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Pollen morphology of the Megamexican cycads reveals the potential of morphometrics to identify cycad genera

Botan‪ical Sciences, 2020
Background: Although pollen morphology has always been an important tool in plant systematics, the possibility of distinguishing between related taxa is still debated. A difficult case is the cycads, where their morphology and small size is very similar.
Andrew P. Vovides, Roger Guevara, Mario Coiro, Sonia Galicia, Carlos Iglesias   +4 more
doaj   +1 more source

Hydrophobia of gymnosperms: myth or reality? A global analysis [PDF]

, 2014
According to the classical textbooks, the gymnosperms are the only seed plants without aquatic species. Recently, however, a set of virtually complete compilations on gymnosperms has been published, enabling a new evaluation of the putative hydrophobia ...
Ashraf, Bond, Bowe, Briand, Burger, Chaw, Cook, Cronk, Debreczy, Del Tredici, Eckenwalder, Enright, Ewers, Falcon-Lang, Farjon, Farjon, Feild, Godfrey, Hogarth, Jackson, Jackson, Jaffré, Jones, Kozlowski, Kramer, Laubenfels, McCoy, Morat, Muhammad, Parent, Ran, Raymond, Reed, Sculthorpe, Shearer, Soltis, Sperry, Sperry, Stebbins, Steenis, Stoffel, Tiner, Tomlinson, Vanderpoorten, Vartapetian, Williams, Yamamoto, Zhao   +47 more
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A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK [PDF]

, 2015
Detailed quantitative data has previously been collected from plant megafossil assemblages from a Middle Jurassic (Aalenian) plant bed from Hasty Bank, North Yorkshire, UK.
Bhowmik, Boulter, Chaloner, Chaloner, Charles H. Wellman, Couper, Cox, Crane, Dettmann, Filatoff, Gedl, Gray, Hammer, Hammer, Hancock, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Hemingway, Hill, Hill, Hubbard, Klavins, Legendre, Levin, Lindley, Nami, Norstog, Parry, Picket, Sam M. Slater, Scheihing, Schweitzer, Traverse, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, Wilson, Ziaja   +46 more
core   +3 more sources

Assessing the reproducibility of discriminant function analyses. [PDF]

, 2015
Data are the foundation of empirical research, yet all too often the datasets underlying published papers are unavailable, incorrect, or poorly curated. This is a serious issue, because future researchers are then unable to validate published results or ...
Albert, Arianne YK, Andrew, Rose L, Bock, Dan G, Renaut, Sebastien, Rennison, Diana J, Vines, Tim   +5 more
core   +3 more sources

La Familia Zamiaceae En Guatemala

Revista Científica, 2008
La actualización del conocimiento de la Coniferas de Guatemala comprende 57 especies de plantas, de las cuales 28 especies son nativas y 29 son exóticas, agrupadas en diferentes familias, una de ellas, la familia Zamiaceae, que es un grupo de plantas parecidas a las palmas y que se estudiaron a través del Proyecto Universitario de Investigación en ...
Marco Antonio Chacón Véliz, A. Barrios, C. Dávila   +2 more
openaire   +2 more sources

Ceratozamia schiblii (Zamiaceae): A New Cycad Species from the Eastern Mountains of Oaxaca, Mexico

Taxonomy, 2022
Ceratozamia schiblii (Zamiaceae), a new species endemic to the highlands of eastern Oaxaca, Mexico, is described. The new species is part of the C. robusta species complex, which is a group of closely related species with very similar morphology.
Miguel Angel Pérez-Farrera, José Said Gutiérrez-Ortega, Timothy J. Gregory, Jeffrey Chemnick, Silvia Salas-Morales, Michael Calonje, Pedro Díaz-Jiménez   +6 more
doaj   +1 more source

Phylogenie und Systematik der Gefäßpflanzen [PDF]

, 2016
Das Lehr- und Lernposter „Stammbaum der Tracheophyten – Phylogenie und Systematik der Gefäßpflanzen“ gibt einen Überblick a) über die Phylogenie (Stammesgeschichte) der „Farnverwandten“ (Lycophyten und Monilophyten, die „Farne“) bis zu den Familien ...
Cole, Theodor C.H., Hilger, Hartmut H.
core   +1 more source

Examining the efficacy of a genotyping-by-sequencing technique for population genetic analysis of the mushroom Laccaria bicolor and evaluating whether a reference genome is necessary to assess homology [PDF]

, 2016
Given the diversity and ecological importance of Fungi, there is a lack of population genetic research on these organisms. The reason for this can be explained in part by their cryptic nature and difficulty in identifying genets.
Borevitz, J., Fant, J., Grabowski, P., Mueller, G. M., Wickett, N. J., Wilson, A. W.   +5 more
core   +1 more source

Dioon spinulosum (Zamiaceae): notorio árbol exótico en Camagüey

Agrisost, 2018
Se devela la identidad de un árbol cultivado en la ciudad de Camagüey con fines ornamentales, que ha alcanzado determinada notoriedad por no conocerse especímenes semejantes en otros jardines del país.
Roeris González Sivilla, Julio C. Rifa Téllezen Ciencias Pedagógicas, Licenciado en Educación, Especialidad Biología. Profesor Auxiliar. Universidad de Camagüey Ignacio Ag   +1 more
doaj   +3 more sources