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Topic: Armen Takhtajan


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In the News (Sun 6 Dec 09)

  
  Armen Takhtajan - Biocrawler   (Site not responding. Last check: 2007-10-13)
Armen Takhtajan (born 1910) is a Russian botanist, one of the most important figures in 20th Century plant evolution and systematics and biogeography.
Takhtajan worked at the Komarov Botanical Institute in Leningrad, where he developed his 1940 classification scheme for flowering plants, which emphasized genetic relationships between plants and plant evolution.
Takhtajan is a member of the Russian Academy of Sciences, as well as as foreign associate of the U.S. National Academy of Sciences since 1971.
www.biocrawler.com /encyclopedia/Armen_Takhtajan   (361 words)

  
 Armen Takhtajan - Wikipedia, the free encyclopedia
Armen Takhtajan (born 1910), aka Armen Leonovich Takhtadjan or Takhtadzhian, is a Soviet-Armenian botanist, one of the most important figures in 20th Century plant evolution and systematics and biogeography.
Takhtajan worked at the Komarov Botanical Institute in Leningrad, where he developed his 1940 classification scheme for flowering plants, which emphasized phylogenetic relationships between plants.
The Takhtajan system is similar to the Cronquist system, but with somewhat greater complexity at the higher levels.
en.wikipedia.org /wiki/Armen_Takhtajan   (303 words)

  
 Flora of North America, Chapter 7: Flowering plant families: An overview
Takhtajan retained Sarraceniaceae in Dilleniidae, Nepenthaceae in Magnoliidae, and Droseraceae in Rosidae.
Cronquist and Takhtajan considered this to be Alismatidae; Dahlgren and Thorne began with the equivalent of Liliidae.
Takhtajan and Thorne have provided me with information that they have yet to publish, and for permission to use their data I am most grateful.
www.life.umd.edu /emeritus/reveal/pbio/usda/fnach15.html   (3123 words)

  
 Diversity and Classification of Flowering Plants:0231100981:Takhtajan, Armen; Takhtadzhian, A. L.:eCampus.com
The culmination of more than fifty years of research by the foremost living expert on plant classification, "Diversity and Classification of Flowering Plants" is an important contribution to the field of plant taxonomy.
Instead of describing every individual family, Takhtajan includes descriptions in keys to families, which he calls "descriptive keys." The advantage of descriptive keys is that they give both the characteristic features of the families and their differences.
Takhtajan favors the smaller, more natural families and orders, which are more coherent and better-defined, where characters are easily grasped, and which are more suitable for information retrieval and phylogenetic studies, including cladistic analysis (because it reduces polymorphic codings).
www.ecampus.com /bk_detail.asp?isbn=0231100981   (157 words)

  
 ON THE ORIGIN OF ANGIOSPERMS
According to Takhtajan (1969, 1991), similarities between the theorized primitive flowering plant and the Magnoliaceae in vegetative and reproductive structure are evident.
Takhtajan (1991) especially emphasizes the importance of the conservation of reproductive structures within the angiosperms, as reproductive structures are not as easily reversible over time as vegetative structures are reversible.
Takhtajan (1991) and Stevens (1980) believe that Magnoliaceae is a preserved “living fossil” of this time period and should carry more phylogenetic weight, as there are not enough angiosperm fossils to draw direct conclusions concerning their origin.
comenius.susqu.edu /bi/202/Journal/vol10/number4/PUBLISHED/on_the_origin_of_angiosperms.htm   (2441 words)

  
 Armen Takhtajan: bio and encyclopedia article   (Site not responding. Last check: 2007-10-13)
Armen Takhtajan (born 1910) is a Russia (A federation in northeastern Europe and northern Asia; formerly Soviet Russia; since 1991 an independent state)
Takhtajan also developed a system of floristic region (A floristic province is a geographic area with a relatively uniform composition of plant species....)
Takhtajan is a member of the Russian Academy of Sciences[click link for more facts about this subject], Exception Handler: No article summary found.
www.absoluteastronomy.com /ref/armen_takhtajan   (999 words)

  
 Dr. Steven P. McLaughlin Homepage   (Site not responding. Last check: 2007-10-13)
Evaluation and comparisons of these new characters led to the proposal of several new classifications toward the end of the 20th Century.
The first of these is that of Armen Takhtajan (1969).
Takhtajan (1997) is a major revision of his earlier system.
ag.arizona.edu /~spmcl/ECOL572/ECOL572.Systems.htm   (257 words)

  
 ARTHUR CRONQUIST RECORDS
In the later 1950's he began a correspondence and collaboration with the Armenian botanist, Armen Takhtajan, of the Komarov Institute in Leningrad, U.S.S.R. His work with Takhtajan and associate biologists at the Komarov proved a critical stimulus in the development of his synthetic projects in general botanic systems.
There are 7 files of Cronquist's correspondence with Armen Takhtajan (1957 to 1992), including 4 pertaining to specific projects or publications undertaken in collaboration.
One file pertains to the Soviet physicist and dissident Andrei Sakharov relating to constituent opinions of the Botanical Society of America members regarding a position statement of the American Association for the Advancement of Science on the Sakharov case in 1973.
www.nybg.org /bsci/libr/Cronweb3.htm   (1589 words)

  
 NEWS on Vascular Plant Family Nomenclature   (Site not responding. Last check: 2007-10-13)
The Takhtajan system is now available on Flowering Plant Gateway at Texas A. A full listing of all validly published flowering plant family names will soon be available.
While Takhtajan states that "I am well aware that I may be regarded as a 'splitter" he notes that by more narrowly defining taxa it becomes easier to "to create a system consisting of better defined monophyletic units."
At present, Takhtajan is not included in either listing pending formal publication of his newest system.
www.biologie.uni-hamburg.de /b-online/library/revfam/www.inform.umd.edu/PBIO/fam/OLDNEWS.html   (2411 words)

  
 The Taxonomy and Phylogeny of the Angiosperms - Peter Morrell
Takhtajan, A. Outline of a classification of flowering plants (Magnoliophyta), Bot.
Takhtajan, A. Evolutionary Trends in Flowering Plants, New York; Columbia Univ. Press.
Takhtajan, A.L. Flowering Plants, Origin and Dispersal, (Translation from the Russian by C. Jeffrey).
www.homeoint.org /morrell/misc/angio.htm   (1598 words)

  
 Floristic province - Wikipedia, the free encyclopedia
Almost all provinces are further subdivided into floristic regions.
Armen Takhtajan, in a widely used scheme that builds on Good's work, identified thirty-five floristic regions, each of which is subdivided into floristic provinces, of which there are 152 in all.
This page was last modified 04:27, 6 March 2006.
en.wikipedia.org /wiki/Floristic_province   (264 words)

  
 Takhtajan, Armen books at the best price
A completely revised system of flowering plants, based on information from the ten years preceding publication.
This work is the culmination of 50 years of research.
Takhtajan's delineation of plant families and orders drastically differs from what is accepted by...
books.kelkoo.co.uk /b/a/cpc_5101_vtl_author_c19376726.html   (59 words)

  
 Diversity And Classification Of Flowering Plants; Author: Takhtajan, Armen; Author: Takhtadzhian, A. L.; Hardback; Book   (Site not responding. Last check: 2007-10-13)
Diversity And Classification Of Flowering Plants; Author: Takhtajan, Armen; Author: Takhtadzhian, A. L.; Hardback; Book
The culmination of more than fifty years of research by the foremost living expert on plant classification, Diversity and Classification of Flowering Plants is an important contribution to the field of plant taxonomy.This work is the culmination of 50 years of research.
Takhtajan's delineation of plant families and orders drastically differs from what is accepted by other experts - he favours smaller natural families and orders where characters are easily grasped.
www.netstoreusa.com /mabooks/023/0231100981.shtml   (214 words)

  
 [No title]
Century, several other systems were published, based on revised ideas of primitive and advanced morphological characteristics, and new information on many additional characters.
The most widely discussed and adopted of these systems were those of Armen Takhtajan, Arthur Cronquist, and Robert Thorne.
Complete synopses of the systems of Takhtajan, Cronquist, and Thorne will also be provided.
ag.arizona.edu /~spmcl/ECOL572/Syllabus05.htm   (686 words)

  
 Umbellifer Resource Centre   (Site not responding. Last check: 2007-10-13)
Armen Takhtajan's classification of the superorder Aralianae, from Diversity and Classification of Flowering Plant Families (1997).
Apiaceae subfamily Hydrocotyloideae is a non-monophyletic taxon some of whose members are better placed in the Araliaceae.
Takhtajan's support of treating this taxon as a family in its own right is currently not widely accepted.
rbg-web2.rbge.org.uk /URC/superorders.htm   (113 words)

  
 Plant Taxonomy - Biology 308
Cronquist and Takhtajan treat angiosperms as a Division.
Thorne and Dahlgren treat angiosperms as a Class with two major subclasses, monocots and dicots.
For fun, take a family and compare its treatment in the classifications of Thorne, Dahlgren, Takhtajan and Cronquist.
employees.csbsju.edu /SSAUPE/biol308/Lecture/Classification/evolutionary_class.htm   (1018 words)

  
 Talk:Plantae - Wikispecies
If the rest gets imported from en: I fear for a mess.
The germans follow another taxonomy, (Armen Takhtajan, Diversity and Classification of Flowering Plants, 1997).
Most links created to species from the dutch plant articles are completely empty.
species.wikipedia.org /wiki/Talk:Plantae   (480 words)

  
 Flowering Plant Gateway - Takhtajan Entry   (Site not responding. Last check: 2007-10-13)
The 'Takhtajan System' of flowering plant classification (Armen Takhtajan.
Diversity and Classification of Flowering Plants) treats flowering plants as as a division or phylum (Magnoliophyta) with two classes (monocots and dicots) which are organized into Subclasses.
However, Takhtajan uses the Superorder as the basic unit of the Subclass and this pattern of organization is also used in the Thorne System of flowering plant classification.
www.csdl.tamu.edu /FLORA/newgate/takh1ang.htm   (122 words)

  
 Darwin-L Message Log 15: 76-104 (November 1994)
Entomology, 10: 97-116): > This mosaiclike distribution of relatively primitive and relatively > derivative characters in related species and species-groups > [Spezialisationskreuzungen, Heterobathmie der Merkmale: Takhtajan > (19)] is a fact which has long been known.
Indeed "Heterobathmie der Merkmale" (heterobathmy of characters) is a neologism by Takhtajan, but "Spezialisationskreuzungen" is not.
Moreover, the German edition included Takhtajan (1959) in its bibliography, which Hennig (1966) did not.
rjohara.net /darwin/logs/1994/9411b   (7436 words)

  
 Botanical Taxonomy -- A Historical Summary - Christopher Hobbs L.Ac., A.H.G. - HealthWorld Online
Asa Gray (1810-1888) is the father of American Botany, and wrote several important botany texts and floras, which can still be found in used book stores today, and are useful for their clear explanation of plant morphology.
August Wilhelm Eichler (1839-1887), Adolf Engler (1844-1930), and Charles Bessey (1845-1915) helped refine previous schemes to make the system we have used until the last few Years, when even further refined, using modern research methods and equipment, such as chemotaxonomy and electron microscopy, by Dr. Armen Takhtajan, and Dr. Arthur Cronquist.
These systems are similar, and are in current use in botany texts of the last few years.
www.healthy.net /LIBRARY/Articles/Hobbs/BOTANY3.HTM   (1306 words)

  
 California Native Plant Society
He has been a Fellow of the Linnaean Society of London and was honored with foreign membership in the Royal Society of Denmark.
I asked Dr. Thorne to compare his classification system with those of fellow taxonomists Arthur Cronquist (1919-1992), Armen Takhtajan, and Rolf Dahlgren, and to that developed by the APG (Angiosperm Phylogeny Group).
Armen Takhtajan, now in his nineties, is the grand old man of Russian botany; the most important taxonomist in the old Soviet Union.
www.occnps.org /MarchApril05.htm   (6063 words)

  
 MBG: Research: Russia: Ornamental plants from Russia   (Site not responding. Last check: 2007-10-13)
This work began while I, Tatyana Shulkina, was a curator of living plant collections at the Komarov Botanical Institute, St. Petersburg, Russia.
The idea of the book was put forward by Academician Armen Takhtajan, to whom I would like to express my deep gratitude.
The manuscript was prepared partly in Russia and was translated, changed and enlarged dramaticaly in the U.S.A. The English text of the book was read and edited line by line by Dr. Charles Jeffrey, and it was a significant progress in completing this book.
www.mobot.org /MOBOT/Research/russia/word.shtml   (307 words)

  
 BEN # 175   (Site not responding. Last check: 2007-10-13)
Takhtajania perrieri was originally described in 1963 by the French forest botanist Rene Capuron in the genus Bubbia, known from Australia, New Caledonia and the Lord Howe Islands.
In St. Louis in June, while celebrating his 87th birthday and the publication of his latest synthesis on the classification of flowering plants, Dr. Takhtajan was presented with a specimen of Takhtajania for the Komarov Botanical Institute in St. Petersburg.
Both he and the entire international botanical community anxiously await the forthcoming studies that this wonderful rediscovery will engender.
www.ibiblio.org /InterGarden/permaculture/mailarchives/ben/msg00015.html   (1000 words)

  
 New Scientist Premium- The networks of botanical creation: Why is it so hard to construct trees of descent for some ...   (Site not responding. Last check: 2007-10-13)
Organisms, like languages, remain classifiable, but some groups are more difficult to sort than others.
For example, in the past 10 years four highly respected plant taxonomists, Arthur Cronquist, Armen Takhtajan, Robert Thorne and Rolf Dahlgren,...
To continue reading this article, subscribe to New Scientist.
www.newscientist.com /article/mg13318074.700.html   (349 words)

  
 Journal of Systematic Biology--Volume 8, Number 4
Sources used to examine characteristics of the genera are abbreviated as follows: B= Bold et al., 1987; C= Cronquist, 1981; D= Davis, 1966; H= Holt, 2000; LY= Lynam et al., 2000; M= Margulis and Schwartz, 1998; ST = Stebbins, 1974; SZ= Szuch et al., 2000; T = Takhtajan, 1997; TA = Takhtajan, 1991.
Characters and their respective states are shown below.
Sources used to determine character states are labeled as follows: B= Bold et al., 1987; C= Cronquist, 1981; D= Davis, 1966; H= Holt, 2000; LY= Lynam et al., 2000; M= Margulis and Schwartz, 1998; ST = Stebbins, 1974; SZ= Szuch et al., 2000; T = Takhtajan, 1997; TA = Takhtajan, 1991.
comenius.susqu.edu /BI/202/Journal/Vol8/number4/dragonflies1publish.html   (1267 words)

  
 Amazon.ca: Anatomy of the Dicotyledons: Magnoliales, Illiciales, and Laurales/Sensu Armen Takhtajan: Books   (Site not responding. Last check: 2007-10-13)
Amazon.ca: Anatomy of the Dicotyledons: Magnoliales, Illiciales, and Laurales/Sensu Armen Takhtajan: Books
Anatomy of the Dicotyledons: Magnoliales, Illiciales, and Laurales/Sensu Armen Takhtajan
Publisher: learn how customers can search inside this book.
www.amazon.ca /exec/obidos/ASIN/0198545932   (226 words)

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