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Terpsichore (plant)
''Terpsichore'' is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is native to the Neotropical realm in the Americas. Description The genus consists of small ferns with arching fronds of determinate size. Rhizomes are radially symmetric or slightly flattened, with orange to brown scales which often bear setulae (small bristles) on the edges and sometimes the surface. Except for ''Terpsichore atroviridis'', sporangia bear setae (bristles). The stipe (botany), stipe (leaf stalk) is distinct from the blade, and the blade does not taper gradually to its attachment to the rhizome. Setae on the leaf tissue are borne singly, rather than in clusters, and hydathodes (enlarged vein endings) do not secrete a chalk precipitate. Unlike ''Ascogrammitis'' and ''Mycopteris'', black fungal fruiting bodies are not found on the leaf blades. Taxonomy ''Terpsichore'' was first species desc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
