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Abacopteris Repanda
''Abacopteris'' is a small genus of ferns in the family Thelypteridaceae. Description ''Abacopteris'' is a genus of medium- to large-sized ferns. Species in the genus usually have long-creeping rhizomes, with brown Glossary of leaf morphology#linear, linear-Glossary of leaf morphology#lanceolate, lanceolate scales that extend onto the base of the stipe (botany), stipe (stalk of the leaf). Fronds are pinnately divided, and fertile and sterile fronds are similar in appearance. The stipes are straw-colored, brown, or reddish. Leaf blades are green in color and thin to leathery in texture. The terminal pinna at the apex of the blade is similar in appearance to the lateral pinnae. The pinnae are not significantly smaller towards the base of the leaf. They may be Glossary of leaf morphology#entire, entire (without teeth or lobes), Glossary of leaf morphology#crenate, crenate, or in one species, shallowly lobed. Taxonomy ''Abacopteris'' was previously sunk into ''Pronephrium'' but was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
