Results 31 to 40 of about 833 (187)

Zamia inermis, the more threatened cycad of Mexico [PDF]

, 2017
Zamia inermis (Zamiaceae) es una cícada rara, endémica y actualmente listada en Peligro Crítico de Extinción. De la misma, sólo se conoce una población compuesta de tres subpoblaciones, que se encuentra distribuido en tan sólo 2,5 km2 de pastizales y ...
Iglesias Andreu, Lourdes Georgina, Octavio Aguilar, Pablo, Rivera-Fernández, Andrés, Vovides, Andrés P.   +3 more
core   +2 more sources

1039 ZAMIA DECUMBENS: Cycadales, Zamiaceae

Curtis's Botanical Magazine, Volume 39, Issue 3, Page 517-539, September 2022., 2022
Summary Zamia decumbens Calonje, Meerman, M.P.Griff. & Hoese, a threatened cycad species from Belize, is showcased and illustrated based on field observations as well as plants cultivated in the ex situ conservation living collections of Montgomery Botanical Center (MBC) in Coral Gables, Florida. This once obscure species was described in 2009, studied
Natalia Herrera‐Blitman, Michael Calonje, Jan Meerman, Rudy Aguilar, Alan W. Meerow, Javier Francisco‐Ortega, M. Patrick Griffith   +6 more
wiley   +1 more source

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
core   +2 more sources

Lords of the biosphere: Plant winners and losers in the Anthropocene

PLANTS, PEOPLE, PLANET, Volume 4, Issue 4, Page 350-366, July 2022., 2022
The impact of humans on Earth's biodiversity varies across the Tree of Life. The extirpation and extinction of species is often determined by compatibility with human activities. Here we classify, where data are available, a significant portion (~30%) of vascular plant species as winners or losers with respect to this compatibility and show that ...
W. John Kress, Gary A. Krupnick
wiley   +1 more source

The dynamic history of gymnosperm plastomes: Insights from structural characterization, comparative analysis, phylogenomics, and time divergence

The Plant Genome, Volume 14, Issue 3, November 2021., 2021
Abstract Gymnosperms are among the most endangered groups of plant species; they include ginkgo, pines (Conifers I), cupressophytes (Conifers II), cycads, and gnetophytes. The relationships among the five extant gymnosperm groups remain equivocal. We analyzed 167 available gymnosperm plastomes and investigated their diversity and phylogeny.
Lubna, Sajjad Asaf, Abdul Latif Khan, Rahmatullah Jan, Arif Khan, Adil Khan, Kyung‐Min Kim, In‐Jung Lee   +7 more
wiley   +1 more source

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

Systematics and Chatacteristics [PDF]

, 2016
The "Tracheophyte Phylogeny Poster – Vascular Plants - Systematics and Characteristics" is an educational tool presenting an overview of the evolutionary relationships among non-flowering vascular plants (lycophytes, monilophytes, and gymnosperms ...
Cole, Theodor C.H., Hilger, Hartmut H.
core   +1 more source

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

Algunas anomalías polínicas en Sideritis del sudeste ibérico. [PDF]

, 1988
En el estudio de 52 poblaciones pertenecientes a 23 taxones de Sideritis L. Secc.Sideritis Bentham, se detectan y discuten tres tipos de anomalías polínicas.Pollen grains of 52 populations of 23 taxa of the genus Sideritis L. Sect. Sideritis Bentham were
Alcaraz-Ariza, Francisco José, Carrión-García, José Sebastián   +1 more
core   +4 more sources