Results 1 to 10 of about 189 (105)
Earliest evolution of stipules among vascular plants documented in the late Paleozoic stem group of Marattiales [PDF]
BMC BiologyBackground Stipules are specialized appendages borne at the base of a leaf petiole and may perform a variety of functions including sheltering delicate growing tissues from environmental exposure, facilitating vegetative propagation and dispersal, and ...
Weiming Zhou +2 more
exaly +6 more sources
Complete plastid genomes from
BMC Evolutionary Biology, 2013 Background Plastid genome structure and content is remarkably conserved in land plants. This widespread conservation has facilitated taxon-rich phylogenetic analyses that have resolved organismal relationships among many land plant groups.
Grewe Felix +4 more
doaj +2 more sources
Fertile pinnules of Danaeites rigida Gu and Zhi (Marattiales) from the Upper Permian of south China [PDF]
Botanical Journal of the Linnean Society, 2001 Recently collected specimens of Danaeites rigida Gu and Zhi from the Upper Permian of south China have been subjected to detailed morphological investigations in order to reveal features of their fertile pinnules. The specimens are preserved as compression/impressions and possess pecopteroid-type pinnules with a single row of synangia on either side of
Jason Hilton
exaly +3 more sources
OSSERVAZIONI PALINOLOGICHE SULLE « MARATTIALES »
Webbia, 1973 RIASSUNTO In questo lavoro vengono esaminate le caratteristiche delle spore delle Marattiales per vedere se la suddivisione di questo ordine in piu famiglie e valida anche dal punto di vista palinologico. Angiopteris, Macroglossum e Archamjiopteris presentano spore molto affini tra di loro, per cui e giustificato riunirle nella famiglia delle ...
exaly +2 more sources
Evolutionary Trends in the Marattiales
Annals of the Missouri Botanical Garden, 1974 The structure of living and fossil marattiaceous ferns is compared organographically. Stelar structure exhibits a basic pattern in all genera in spite of modifications correlated with size and symmetry. Fronds exhibit gross morphological and anatomical differences but can likewise be interpreted as specializations associated with size and form, and ...
exaly +3 more sources
Epidermis y estomatogénesis en Marattiaceae (Marattiales-Eusporangiopsida)
Revista del Museo de La PlataEl presente trabajo contribuye al conocimiento de la morfología epidérmica de helechos eusporangiados, analizando 8 especies, no estudiadas previamente, de Angiopteris Hoffmann, Danaea J. B. Smith y Marattia Sw.
Cristina Rolleri +2 more
doaj +1 more source
Revista del Museo de La PlataSe estudia la morfología epidérmica y los peculiares pneumatodes de lasfrondes de Christensenia-cumingiana Christ (Marattiacere).La epidermis adulta se analiza en superficie y en cortes transversales,brindándose información ...
Cristina Rolleri +2 more
doaj +1 more source
Revista Mexicana de Ciencias Geológicas, 2018 The dimorphic marattialian fern Tranquilia whitneyi (Newberry) Herbst - formerly “Alethopteris whitneyi Newberry” and “Pecopteris falcatus Emmons”- from the Carnian (and perhaps Norian?) Santa Clara Formation of central Sonora, NW Mexico, is redescribed.
Reinhard Weber
doaj +1 more source
Revista Mexicana de Ciencias Geológicas, 2023 La paleoflora de la Formación Tuzancoa ha sido estudiada desde mediados del siglo pasado. Sin embargo, el constante descubrimiento de nuevos elementos florísticos y/o localidades hace necesaria una reevaluación del conocimiento actual de la paleoflora ...
Miguel Angel Flores-Barragan +2 more
doaj +1 more source
3D Chemometric Model Simulating the Acitheca Polymorpha Frond: Implications for Reconstructing Carboniferous Ferns (Marattiales, Canada) [PDF]
Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica, 2021 Abstract Reported are results of an initial approximate imitation of a Carboniferous fern frond, i.e., marattialean Acitheca polymorpha (Schimper), Middle Pennsylvanian Sydney Coalfield, Canada. The simulation experiment is based on the analysis of 14 infrared spectra obtained by means of Fourier Transform Infrared spectroscopy from ...
D`angelo, José Alejandro +2 more
openaire +2 more sources