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Phegopteris Hexagonoptera
''Phegopteris hexagonoptera'', commonly called the broad beech fern, is a common forest fern in the eastern United States and adjacent Ontario. It grows from a creeping rootstock, sending up individual fronds that more or less clump. Its native habitat includes moist, undisturbed, hardwood forests. The fronds are broadly triangular. The specific name ''hexagonoptera'' refers to the winging of leaf tissue along the rachis between the basal pinnae. Sori are small, round and naked. This aspect of the plant has caused it in the past to be placed, at first, in the genus ''Polypodium'', then grouped with genus ''Dryopteris'', then with the genus ''Thelypteris''. Genetic analysis has shown the genus ''Phegopteris'' to be a sister clade to the rest of the thelypteroid ferns. Rare hybrids with ''Phegopteris connectilis ''Phegopteris connectilis'', commonly known as long beech fern, northern beech fern, and narrow beech fern, is a species of fern native to forests of the Northern Hem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phegopteris
''Phegopteris'' is a genus of ferns in the family Thelypteridaceae, subfamily Phegopteridoideae, in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). They are known collectively as the beech ferns. Species are native to Asia, North America and Europe. Taxonomy ''Phegopteris'' was first described in 1852 by Carl Borivoj Presl as an unranked taxon within the genus '' Polypodium''. It was raised to the rank of genus by Antoine Fée in the same year. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognizes three genera in the subfamily Phegopteridoideae: ''Macrothelypteris'', ''Phegopteris'' and ''Pseudophegopteris''. , both the ''Checklist of Ferns and Lycophytes of the World'' and ''Plants of the World Online'' regarded ''Pseudophegopteris'' as a synonym of ''Phegopteris''. Species , the ''Checklist of Ferns and Lycophytes of the World'' accepted the following species: *''Phegopteris andringitrensis'' (Rakotondr.) Christenh. *''Phegopteris a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antoine Laurent Apollinaire Fée
Antoine Laurent Apollinaire Fée was a French botanist who was born in Ardentes, 7 November 1789, and died in Paris on 21 May 1874. He was the author of works on botany and mycology, practical and historical pharmacology, Darwinism, and his experiences in several regions of Europe. Biography After serving as a medical orderly during Napoleon's campaign in Spain, Fée established a pharmacy in Paris. He was schooled in the profession in Strasbourg, receiving his degree in 1815. He met the botanist Christiaan Hendrik Persoon in 1823, and came to be strongly influenced by him. Fée later became an instructor at teaching hospitals, firstly in Lille in 1825, then at Strasbourg in 1832. There he was promoted to M.D. and professor of botany. He also managed the botanical garden until Strasbourg was taken by the Prussians at the end of their war with France. Fée left and moved to Paris. In 1874 he was elected as the president of the Société botanique de France. He was a crypt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Christensen (botanist)
Carl Frederik Albert Christensen (16 January 1872 – 24 November 1942) was a Danish systematic botanist. He graduated in natural history from the University of Copenhagen under professor Eugenius Warming. He was then a school teacher in Copenhagen, and later superintendent at the Botanical Museum. He was a specialist in ferns and published a catalogue of the World's Pteridophytes, ''Index Filicum''. In addition, he authored a three-volume work on the history of botany in Denmark. Selected scientific works * Christensen, Carl (1905–06) Index Filicum ''Index Filicum'' is a discontinued series of botanical indices on ferns, started by Carl Christensen in 1906 and continued in the form of seven supplements by Christensen and other authors until 1997. As of supplement 5, the index also covered lyc .... 744 s. Index Filicum Supplementum I-III (1913–17). Reprint 1973 by Koeltz Antiquariat. * Christensen, Carl (1924-1926) Den danske botaniks historie med tilhørende Bibliograf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Alfred Weatherby
Charles Alfred Weatherby (1875–1949) was an American botanist. Weatherby was born in Hartford, Connecticut, to Charles Nathaniel Weatherby and his wife, the former Grace Weld. Not long after Charles Alfred's birth, the family moved to Colorado. However, when he reached school age his parents sent him back to Connecticut. Weatherby studied literature at Harvard University, graduating summa cum laude in 1897. From 1899 to 1905 Weatherby was ill and lived with his mother in East Hartford. It was during this time he began his interest in botany and joined the Connecticut Botanical Society. In 1910 Weatherby went to Europe, where he met Una Leonora Foster, an artist with an interest in botany. They married in 1917. Weatherby later volunteered as an assistant at the Gray Herbarium, then was an assistant curator and eventually the curator, specializing in the study of wildflowers. In 1910, he published and described a new tree, ''Quercus rysophylla ''Quercus rysophylla'', the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fern
A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except the lycopods, and differ from mosses and other bryophytes by being vascular, i.e., having specialized tissues that conduct water and nutrients and in having life cycles in which the branched sporophyte is the dominant phase. Ferns have complex leaves called megaphylls, that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns. They produce coiled fiddleheads that uncoil and expand into fronds. The group includes about 10,560 known extant species. Ferns are defined here in the broad sense, being all of the Polypodiopsida, comprising both the leptosporangiate (Polypodiidae) and eusporangiate ferns, the latter group including horsetails, whisk ferns, marattioid ferns, and ophioglossoid ferns. Ferns first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Canada, it is Canada's most populous province, with 38.3 percent of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's fourth-largest jurisdiction in total area when the territories of the Northwest Territories and Nunavut are included. It is home to the nation's capital city, Ottawa, and the nation's most populous city, Toronto, which is Ontario's provincial capital. Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast, and to the south by the U.S. states of (from west to east) Minnesota, Michigan, Ohio, Pennsylvania, and New York. Almost all of Ontario's border with the United States f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polypodium
''Polypodium'' is a genus of ferns in the family Polypodiaceae, subfamily Polypodioideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The genus is widely distributed throughout the world, with the highest species diversity in the tropics. The name is derived from Ancient Greek ''poly'' (πολύ) "many" + ''podion'' (πόδιον) "little foot", on account of the foot-like appearance of the rhizome and its branches. They are commonly called polypodies or rockcap ferns, but for many species unique vernacular names exist. They are terrestrial or epiphytic ferns, with a creeping, densely hairy or scaly rhizome bearing fronds at intervals along its length. The species differ in size and general appearance and in the character of the fronds, which are evergreen, persisting for 1–2 years, pinnate or pinnatifid (rarely simple entire), and from 10–80 cm or more long. The sori or groups of spore-cases (sporangia) are borne on the back of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryopteris
:''The moth genus ''Dryopteris'' is now considered a junior synonym of '' Oreta. ''Dryopteris'' , commonly called the wood ferns, male ferns (referring in particular to ''Dryopteris filix-mas''), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). There are about 300-400 species in the genus. The species are distributed in Asia, the Americas, Europe, Africa, and the Pacific islands, with the highest diversity in eastern Asia. It is placed in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Many of the species have stout, slowly creeping rootstocks that form a crown, with a vase-like ring of fronds. The sori are round, with a peltate indusium. The stipes have prominent scales. Hybridization and polyploidy are well-known phenomena in this group, with many species forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thelypteris
''Thelypteris'' (maiden ferns) is a genus of ferns in the subfamily Thelypteridoideae, family Thelypteridaceae, order Polypodiales. Two radically different circumscriptions of the genus are in use . In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the genus is a very small one with about two species. In other approaches, the genus is the only one in the subfamily Thelypteridoideae, and so includes between 875 and 1083 species. The genus name is from Greek ''thēlys'' "female" and ''pteris'' "fern". However, "female fern" usually refers to the common lady-fern. Taxonomy At one time, all thelypterioid ferns were included in the genus '' Dryopteris'' because of the sorus shape. However, there are a great many differences between the groups, and these plants are now segregated in their own family. Some researchers include the entire family Thelypteridaceae in the genus ''Thelypteris''. An intermediate position is to place the bulk in ''Thelypteris'' (correspo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Clade
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxonomi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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