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Arisarum × Aspergillum
''Arisarum'' is a genus of flowering plants in the family (biology), family Araceae. It is native to the Mediterranean region, east to the Caucasus and west to Macaronesia. Taxonomy Species Accepted species: Natural Hybrids # ''Arisarum × aspergillum'' Dunal - Spain, Algeria, Morocco (A. simorrhinum × A. vulgare) Phylogeny It is closely related to the genera ''Ambrosina'', ''Peltandra'', and ''Typhonodorum''. ''Ambrosina'' is the sister group to ''Arisarum'', from which it separated about 46.1 Million years ago.Mansion, G., Rosenbaum, G., Schoenenberger, N., Bacchetta, G., Rosselló, J. A., & Conti, E. (2008)"Phylogenetic analysis informed by geological history supports multiple, sequential invasions of the Mediterranean Basin by the angiosperm family Araceae."Systematic Biology, 57(2), 269-285. The precise relationships are displayed in the following cladogram: Description In ''A. simorrhinum'', the peduncle (botany), flower stalk is shorter or equal in length to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
