Results 21 to 30 of about 387 (129)

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

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

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

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

The complete mitochondrial genome of Zamia integrifolia uncovers distinct patterns of genomic turnover and repeat expansion in Zamiaceae

Frontiers in Plant Science
IntroductionGymnosperm mitochondrial genomes exhibit substantial variation in size and structure, yet the evolutionary dynamics of Cycadales remain insufficiently explored beyond the genus Cycas.MethodsWe assembled the complete mitochondrial genome of ...
Zhaowu Zhang, Zhaowu Zhang, Shanshan Dong, Zhijing Qiu, Yunhua Wang, Ting Chen, Yiqing Gong, Tengbo Huang, Hui Wang   +8 more
doaj   +1 more source

Historia natural de Dioon Merolae (Zamiaceae)en Chiapas, México

Botan‪ical Sciences, 2012
Se recopilan observaciones sobre la espadaña (Dioon merolae, Zamiaceae) de la Depresión Central (530-600 m) y de la Sierra Madre de Chiapas (1,100-1,200 m).
Julia Manuela Lázaro-Zermeño, Mario González-Espinosa, Ana Mendoza, Miguel Martínez-Ramos   +3 more
doaj   +1 more source

Sobre la utilización del microscopio electrónico de barrido en el estudio de hojas fósiles del cretácico inferior de Patagonia, Argentina

Botan‪ical Sciences, 1974
Se dan a conocer los resultados del estudio de cutículas fósiles del Cretácico inferior de Argentina mediante el uso del microscopio electrónico de barrido.
Sergio Archangelsky
doaj   +1 more source

The Franks Model CO2 Proxy: Do Assimilation Rate Values or Isotopic Corrections Optimize CO2 Reconstruction Accuracy?

Paleoceanography and Paleoclimatology, Volume 41, Issue 4, April 2026.
Abstract Paleo‐CO2 proxies are crucial for reconstructing past atmospheric CO2 variations and understanding their impact on Earth's climate, especially in light of anthropogenic climate change. The mechanistic leaf gas exchange model of Franks et al.
H. Morck, H. Teickner, K.‐H. Knorr, P. E. Jardine   +3 more
wiley   +1 more source

Characterization of the complete chloroplast genome of endangered Cycads Zamia fischeri Miq. ex Lem

Mitochondrial DNA. Part B. Resources, 2018
The whole chloroplast (cp) genome sequence of Zamia fischeri has been characterized. The cp genome length was 164,767 bp in length, with a GC content of 39.7%, containing a large single copy (LSC) of 90,226 bp, a small single copy (SSC) of 23,223 bp, and
Jin-Yan Lei, Damien Daniel Hinsinger, Guo-Feng Jiang   +2 more
doaj   +1 more source

Integrative phylogenomics and morphology reveal the evolution and biogeography of Encephalartos (Zamiaceae)

Journal of Systematics and Evolution, Volume 64, Issue 2, Page 295-312, March 2026.
We aimed to conduct phylogenetic analyses of Encephalartos, a cycad genus endemic to Africa, using 3545 single‐copy nuclear genes extracted from transcriptome data, covering 64/65 of the recognized species, along with inference of divergence times using two secondary calibration points.
Sadaf Habib, Anders Lindstrom, James A.R. Clugston, Yiqing Gong, Shanshan Dong, Yunhua Wang, Dennis Stevenson, Chen Feng, Shouzhou Zhang   +8 more
wiley   +1 more source