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Douinia Ovata
''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a French bryologist who was a native of Bouville, Eure-et-Loir. The genus was circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ... by Christian Erasmus Otterstrøm Jensen in Commentat. Biol. Vol.3 (Issue 1) on page 13 in 1928. Species * '' Douinia imbricata'' (M.Howe) Konstant. & Vilnet * '' Douinia ovata'' (Dicks.) H.Buch * '' Douinia plicata'' (Lindb.) Konstant. & Vilnet References {{Taxonbar, from=Q13575051 Scapaniaceae Jungermanniales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liverwort
The Marchantiophyta () are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of genetic information. It is estimated that there are about 9000 species of liverworts. Some of the more familiar species grow as a flattened leafless thallus, but most species are leafy with a form very much like a flattened moss. Leafy species can be distinguished from the apparently similar mosses on the basis of a number of features, including their single-celled rhizoids. Leafy liverworts also differ from most (but not all) mosses in that their leaves never have a costa (present in many mosses) and may bear marginal cilia (very rare in mosses). Other differences are not universal for all mosses and liverworts, but the occurrence of leaves arranged in three ranks, the presence of deep lobes or segmented leaves, or a lack of clearly diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scapaniaceae
Scapaniaceae is a family of liverworts in order Jungermanniales Jungermanniales is the largest order of liverworts. They are distinctive among the liverworts for having thin leaf-like flaps on either side of the stem. Most other liverworts are thalloid, with no leaves. Due to their dorsiventral organization .... The family has been extended to include the former family Lophoziaceae. References External links * * Liverwort families {{Bryophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Isidore Douin
Charles Isidore Douin (1858 – 1944) was a French bryologist who was a native of Bouville, Eure-et-Loir. Biography He taught school in Chartres, and was the author of a highly regarded work on mosses and liverworts titled ''Nouvelle flore des mousses et des hépatiques pour la détermination facile des espèces'' (1892). He also published a book involving bryology of Eure-et-Loir, ''Muscinées d'Eure-et-Loir'' (1906). The liverwort genus ''Douinia'' from the family Scapaniaceae is named in his honor in 1928. Bryophyte Flora of North America, Provisional Publication, Douinia References * ''Parts of this article are based on a translation of an equivalent article at the French Wikipedia.'' 1858 births 1944 deaths People from Eure-et-Loir 20th-century French botanists Bryologists ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circumscription (taxonomy)
In biological taxonomy, circumscription is the content of a taxon, that is, the delimitation of which subordinate taxa are parts of that taxon. If we determine that species X, Y, and Z belong in Genus A, and species T, U, V, and W belong in Genus B, those are our circumscriptions of those two genera. Another systematist might determine that T, U, V, W, X, Y, and Z all belong in genus A. Agreement on circumscriptions is not governed by the Codes of Zoological or Botanical Nomenclature, and must be reached by scientific consensus. A goal of biological taxonomy is to achieve a stable circumscription for every taxon. This goal conflicts, at times, with the goal of achieving a natural classification that reflects the evolutionary history of divergence of groups of organisms. Balancing these two goals is a work in progress, and the circumscriptions of many taxa that had been regarded as stable for decades are in upheaval in the light of rapid developments in molecular phylogenetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christian Erasmus Otterstrøm Jensen
Christian Erasmus Otterstrøm (Otterström) Jensen (1859–1941) was a Danish pharmacist and botanist, for decades a leading bryologist in Scandinavia. He studied botany and pharmaceutics at the University of Copenhagen and the Pharmaceutical College in Copenhagen. For the better part of his adult life, he ran a pharmacy in Hvalsø, Denmark, while devoting all available time to the study of mosses Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) ''sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and horn .... Selected works *Jensen, C. (1885) '' Novaia Zemlia,'' Th. Holm. In: . Copenhagen. *Jensen, C. (1915–1923) . Copenhagen, Gyldendalske Boghandel/Nordisk Forlag. **1. ''Hepaticales, Anthocerotales og Sphagnales'', 317 pp. **2. ''Andreæales og Bryales'', 569 pp. * Jensen, C. (1909) Kungliga Svenska Vetenskapsakademiens Handlingar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douinia Imbricata
''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a French bryologist who was a native of Bouville, Eure-et-Loir. The genus was circumscribed by Christian Erasmus Otterstrøm Jensen in Commentat. Biol. Vol.3 (Issue 1) on page 13 in 1928. Species * '' Douinia imbricata'' (M.Howe) Konstant. & Vilnet * ''Douinia ovata ''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a Fren ...'' (Dicks.) H.Buch * '' Douinia plicata'' (Lindb.) Konstant. & Vilnet References {{Taxonbar, from=Q13575051 Scapaniaceae Jungermanniales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douinia Ovata
''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a French bryologist who was a native of Bouville, Eure-et-Loir. The genus was circumscribed In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. Not every polyg ... by Christian Erasmus Otterstrøm Jensen in Commentat. Biol. Vol.3 (Issue 1) on page 13 in 1928. Species * '' Douinia imbricata'' (M.Howe) Konstant. & Vilnet * '' Douinia ovata'' (Dicks.) H.Buch * '' Douinia plicata'' (Lindb.) Konstant. & Vilnet References {{Taxonbar, from=Q13575051 Scapaniaceae Jungermanniales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douinia Plicata
''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a French bryologist who was a native of Bouville, Eure-et-Loir. The genus was circumscribed by Christian Erasmus Otterstrøm Jensen in Commentat. Biol. Vol.3 (Issue 1) on page 13 in 1928. Species * ''Douinia imbricata'' (M.Howe) Konstant. & Vilnet * ''Douinia ovata ''Douinia'' is a genus of liverworts belonging to the family Scapaniaceae. The species of this genus are found in Eurasia and Northern America. The genus name of ''Douinia'' is in honour of Charles Isidore Douin (1858 – 1944), who was a Fren ...'' (Dicks.) H.Buch * '' Douinia plicata'' (Lindb.) Konstant. & Vilnet References {{Taxonbar, from=Q13575051 Scapaniaceae Jungermanniales genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |