(1987-1988) Proposals to conserve the name Danaeopsis Heer ex Schimp. (fossil Pteridophyta) against Marantoidea (fossil Pteridophyta) and Danaeopsis C. Presl (recent Pteridophyta) and the name Taeniopteris marantacea (fossil Pteridophyta) with a conserved
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منابع مشابه
Palynological analysis of Sphaeropteris gardneri (Cyatheaceae, Pteridophyta).
The spore morphology and wall ultrastructure of Sphaeropteris gardneri (Hook.) R.M. Tryon from Brazil were analyzed with LM, SEM and TEM. The spores are trilete with an ornamentation formed of short low ridges with spines in their margins. The exospore is 2.5microm thick, two- layered in section and single or branched channels are present. The perispore is 1.2microm thick and two-layered. The i...
متن کاملApplication of the ITS2 Region for Barcoding Medicinal Plants of Selaginellaceae in Pteridophyta
BACKGROUND Selaginellaceae is a family of nonseed plants with special evolutionary significance. Plants of the family Selaginellaceae are similarly shaped and easily confused, complicating identification via traditional methods. This study explored, for the first time, the use of the DNA barcode ITS2 to identify medicinal plants of the Selaginellaceae family. METHODOLOGY/PRINCIPAL FINDINGS In...
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Cercosporoid fungi (former Cercospora s. lat.) represent one of the largest groups of hyphomycetes belonging to the Mycosphaerellaceae (Ascomycota). They include asexual morphs, asexual holomorphs or species with mycosphaerella-like sexual morphs. Most of them are leaf-spotting plant pathogens with special phytopathological relevance. The only monograph of Cercospora s. lat., published by Chupp...
متن کاملSporophyte morphology and gametophyte development of the fern Blechnum sprucei (Pteridophyta: Blechnaceae).
The fern Blechnum sprucei grows in Mesoamerica (Costa Rica) and South America, from Colombia to Bolivia, SE and centre of Brazil, Paraguay and Argentina. It is a distinctive, somewhat vulnerable, mostly orophilous species. Fresh and dry herbarium material was used for this study. Herbarium material for anatomical studies comes from CTES, BA, LP, MA, SI and UC (Holmgren et al. 1990). Selected re...
متن کاملIsozyme variation and genetic relationships among taxa in the Asplenium obovatum group (Aspleniaceae, Pteridophyta).
The Asplenium obovatum group consists of diploid and tetraploid taxa; the origin of the tetraploid A. obovatum subsp. lanceolatum was previously considered to have occurred via autopolyploidy, involving one of the diploids of the group, either A. obovatum subsp. obovatum var. obovatum or var. protobillotii. To test this hypothesis, electrophoretic analyses of eight enzyme systems encoded by fou...
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ژورنال
عنوان ژورنال: TAXON
سال: 2010
ISSN: 0040-0262
DOI: 10.1002/tax.596034