Results 21 to 30 of about 1,802 (206)

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

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

Early evolutionary colocalization of the nuclear ribosomal 5S and 45S gene families in seed plants: evidence from the living fossil gymnosperm Ginkgo biloba [PDF]

, 2012
In seed plants, the colocalization of the 5S loci within the intergenic spacer (IGS) of the nuclear 45S tandem units is restricted to the phylogenetically derived Asteraceae family. However, fluorescent in situ hybridization (FISH) colocalization of both
Galián, José A., Rosato, Marcela, Rosselló Picornell, Josep Antoni   +2 more
core   +1 more source

EST analysis in Ginkgo biloba: an assessment of conserved developmental regulators and gymnosperm specific genes [PDF]

, 2005
Background: Ginkgo biloba L. is the only surviving member of one of the oldest living seed plant groups with medicinal, spiritual and horticultural importance worldwide.
Brenner, E. D., Katari, M. S., Stevenson, D. W., Rudd, S. A., Douglas, A. W., Moss, W. N., Twigg, R. W., Runko, S. J., Stellari, G. M., McCombie, W. R., Coruzzi, G. M.   +10 more
core   +1 more source

Paleogeographic and litho-facies formation conditions of MidUpper Jurassic sediments in S-E Western Siberia (Tomsk Oblast) [PDF]

, 2016
This paper describes the criteria to identify Tumen (lower Bathonian) and Naunak (upper Bathonian-Callovian- Oxfordian) suites within S-E Western Siberia (Tomsk Oblast).
Rychkova, Irina Vladimirovna, Shaminova, Marina Ivanovna, Sterzhanova, Ju.   +2 more
core   +1 more source

Data Capture and Taxonomic Determination of Cycadales at the Royal Botanic Garden Edinburgh

Sibbaldia, 2010
This paper discusses a curatorial review of the Cycadales in the Living Collection at the Royal Botanic Garden Edinburgh (RBGE) following the methodology described by Frachon et al. (2009).
James Clugston
doaj   +1 more source

Zamia magnifica (Zamiaceae, Cycadales): A New Rupicolous Cycad Species from Sierra Norte, Oaxaca, Mexico

Taxonomy, 2023
Zamia magnifica (Zamiaceae), a new species endemic to Sierra Norte, Oaxaca, Mexico, is described. Zamia magnifica is characterized by having a rupicolous habit, pendent leaves bearing leaflets that are densely tomentose and pink to caramel in color when ...
Miguel Angel Pérez-Farrera, José Said Gutiérrez-Ortega, Mauricio Gerónimo Martínez-Martínez, Michael Calonje   +3 more
doaj   +1 more source

G-fibers and Florin ring-like structures in Dioon (Zamiaceae)

Botan‪ical Sciences, 2016
Cuticle information and epidermal characters have great potential in systematic studies.  However, micromorphology and anatomical studies on cycads are relatively scarce in comparison to similar studies on other gymnosperms.
Andrew P. Vovides, Sonia Galicia
doaj   +1 more source

Functional distinctiveness of major plant lineages [PDF]

, 2014
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/106060/1/jec12208.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/106060/2/jec12208-sup-0001-Supp_Info ...
Aarssen, Lonnie, Austin, Amy, Beaulieu, Jeremy M., Cornwell, William K., Eastman, Jonathan M., Falster, Daniel S., FitzJohn, Richard G., Kooyman, Robert M., Leishman, Michelle R., McGlinn, Daniel J., Miller, Eliot T., Moles, Angela T., Niinemets, Ülo, O'Meara, Brian C., Oleksyn, Jacek, Ordonez, Alejandro, Pennell, Matthew W., Reich, Peter B., Royer, Dana L., Smith, Stephen A., Stevens, Peter F., Tank, David C., Warman, Laura, Westoby, Mark, Wilf, Peter, Wright, Ian J., Zanne, Amy E.   +26 more
core   +1 more source

MIDDLE JURASSIC FLORA FROM THE HOJEDK FORMATION OF TABAS, CENTRAL EAST IRAN: BIOSTRATIGRAPHY AND PALAEOCLIMATE IMPLICATIONS

Rivista Italiana di Paleontologia e Stratigrafia, 2018
The Middle Jurassic deposits of the Shemshak Group and Hojedk Formation are widespread in North, Central, and Central East Iran. In this paper, the Hojedk Formation in South Kouchekali, southwestern Tabas city, east-central Iran was studied for ...
FATEMEH VAEZ-JAVADI
doaj   +1 more source