Toward a monophyletic Cheilanthes: The resurrection and recircumscription of Myriopteris (Pteridaceae)
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چکیده
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Toward a monophyletic Cheilanthes: The resurrection and recircumscription of Myriopteris (Pteridaceae)
The fern genus Cheilanthes (Pteridaceae) has perplexed taxonomists for more than two centuries. Complex patterns of evolution involving rampant morphological convergence, polyploidy, hybridization, and apomixis have made the taxonomy of this group especially difficult. Fortunately, recent phylogenetic analyses have helped to clarify relationships among cheilanthoid taxa. Based on these findings...
متن کاملGaga, a New Fern Genus Segregated from Cheilanthes (Pteridaceae)
Ongoing molecular phylogenetic studies of cheilanthoid ferns confirm that the genus Cheilanthes (Pteridaceae) is polyphyletic. A monophyletic group of species within the hemionitid clade informally called the “C. marginata group” is here shown to be distinct from its closest relatives (the genus Aspidotis) and phylogenetically distant from the type species of Cheilanthes. This group is here seg...
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With over 1,000 species, Pteridaceae comprises approximately 10% of extant fern diversity and is notable for its extreme morphological and ecological disparity. In addition to species-rich and predominantly forest-dwelling genera such as Adiantum and Pteris, the family includes floating, freshwater aquatics (Ceratopteris), mangrove specialists (Acrostichum), obligate epiphytes (Vittaria), and e...
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wuthering heights and the concept of marality/a sociological study of the novel
to discuss my point, i have collected quite a number of articles, anthologies, and books about "wuthering heights" applying various ideas and theories to this fantastic story. hence, i have come to believe that gadamer and jauss are rightful when they claim that "the individaul human mind is the center and origin of all meaning," 3 that reading literature is a reader-oriented activity, that it ...
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ژورنال
عنوان ژورنال: PhytoKeys
سال: 2013
ISSN: 1314-2003,1314-2011
DOI: 10.3897/phytokeys.32.6733