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Eudicots - Wikipedia, the free encyclopedia In the APG-system, the names eudicots or tricolpates are applied to a monophyletic group that includes most of the (former) dicotyledons. The name "eudicots" is formed by adding the prefix "eu−" (="true") to "dicots". Since "dicots" is short for "dicotyledons" it is tempting to jump to the conclusion that "eudicots" is short for "eudicotyledons". en.wikipedia.org /wiki/Eudicotyledon   (226 words)

Dicotyledon - Wikipedia, the free encyclopedia The vast majority of the former dicots, however, form a monophyletic group called the eudicots or tricolpates. Other dicotyledons and monocotyledons have monosulcate pollen, or forms derived from it, whereas eudicots have tricolpate pollen, or derived forms, the pollen having three or more pores set in furrows called colpi. In some schemes, the eudicots are treated as a separate class, the Rosopsida (type genus Rosa), or as several separate classes. en.wikipedia.org /wiki/Dicotyledon   (405 words)

Encyclopedia: Dicotyledon   (Site not responding. Last check: 2007-10-09) The Angiosperm Phylogeny Group is an international group of systematic botanists who have come together to try to establish a consensus view of the taxonomy of flowering plants in the light of the rapid rise of molecular systematics. In phylogenetics, a group is monophyletic (Greek: of one stem) if all organisms in that group are known to have developed from a common ancestral form, and all descendants of that form are included in the group. Eudicots Families Annonaceae Degeneriaceae Eupomatiaceae Himantandraceae Magnoliaceae Myristicaceae The Magnoliales are an order of flowering plants. www.nationmaster.com /encyclopedia/Dicotyledon   (3507 words)

Fossil reproductive structures from the Cretaceous of early diverging eudicot affinity - Maria von Balthazar   (Site not responding. Last check: 2007-10-09) Apart from that, a considerable diversity in floral structures and organization especially in the perianth is present among members of this grade of early diverging eudicots and the ranunculids. This is in distinct contrast to core eudicots, where whorled phyllotaxis of petals, stamens, and carpels with relatively fixed numbers of organs is predominant. The diversity in number and arrangement of floral organs among extant early diverging eudicots indicates a flexible situation with easy transitions between different arrangement patterns at this level of floral evolution before leading to a later canalization of the flower organization, as found in most core eudicots. www.nrm.se /pb/research/Projects/mb_Keudicot2eng.html   (238 words)

Core Eudicots The core eudicots are an extremely large, diverse assemblage of flowering plants, with an enormous range of variation in habit, morphology, chemistry, geographic distributions, and other attributes. Instead, the circumscription of the core eudicots as a clade was based on the very strong support obtained in analyses of DNA data sets (e.g., Hoot et al., 1999; Savolainen et al., 2000a; P. Soltis et al., 1999; D. Soltis et al., 2000). The placement of Gunnerales as sister to the rest of the core eudicots implies that the pentamerous perianth typical of most core eudicots was derived from dimerous ancestors (Ronse DeCraene et al., 2003; D. Soltis et al., 2003). tolweb.org /tree?group=Core_Eudicots   (4199 words)

The Cretaceous diversification of eudicot angiosperms - Maria von Balthazar   (Site not responding. Last check: 2007-10-09) In structural terms the eudicots are defined by their tricolpate or tricolpate derived pollen and the group is also sometimes referred to as the tricolpate clade. Tricolpate pollen first appears in the fossil record in the Barremian and provides unequivocal evidence that the eudicots were established soon after the first appearance of angiosperms in the earliest Cretaceous. The eudicots diversified strongly during the mid-Cretaceous and onwards resulting in most of the extant angiosperm diversity. www.nrm.se /pb/research/Projects/mb_Keudicot1eng.html   (179 words)

[No title]   (Site not responding. Last check: 2007-10-09) Eudicots are probably the most successful plant groups on earth. The most diverse group within the Eudicots are the Core Eudicots; other Eudicots are thought to have branched off early in the evolution of flowering plants. In both core and non-core eudicots, it helps regulate production of another part of the flower (the carpals, which are part of the female flower structure). arstechnica.com /journals/science.ars/2005/11/8/1755   (1812 words)

Palaeodicotyledon - Wikpedia   (Site not responding. Last check: 2007-10-09) In some newer classifications, the eudicots are treated as a separate class Rosopsida, in which case the palaeodicots are grouped as a paraphyletic class Magnoliopsida or further divided into several classes. Based on recent DNA analyses, it appears that ancestors of the shrub Amborella trichopoda, the only species in order Amborellales, were the first to split off from the main Angiosperm line, followed by the Nymphaeales and Austrobaileyales. The next main split occurred when the ancestor of the Ceratophyllales and Eudicots diverged from the ancestor of the sister taxa Chloranthales, Magnoliids, and Monocots. www.bostoncoop.net /~tpryor/wiki/index.php?title=Palaeodicotyledon   (138 words)

Basal Eudicots At the base of the Eudicots are lineages that tend to show some ancestral characteristics; these lineages are known as the Basal Eudicots. Basal eudicots probably form a grade of branches and are, thus, probably paraphyletic. The numerous stamens and numerous separate carpels are typical Ranunculaceae and Basal Eudicot traits. courses.bio.psu.edu /bio414/Bsleud.html   (2518 words)

Untitled Document Most classifications (and therefore most keys and floras that you will use to identify plants) recognize a basic split between the monocots and dicots, even though we now know that this is somewhat inaccurate. The monocots are a monophyletic group, but the traditional dicots are paraphyletic and includes all the basal angiosperm lineages plus the monophyletic true or eudicots which are united by triaperturate pollen. Triaperturate pollen is more recently evolved than previously thought and plants with this type of pollen are referred to as eudicots. mercury.bio.uaf.edu /courses/biol331/5feb.html   (800 words)

RBGE: Floral evolution at the transition from basal to core eudicots The basal eudicots are strongly similar to basal angiosperms in their floral structure, with trimerous or dimerous, apetalous flowers or pseudanthia, and a variable stamen and carpel number. The core eudicots have a generalized pattern that is highly constant but different from the basal eudicots: pentamerous flowers with a clear differentiation of sepals and petals, a diplostemonous androecium and a synorganized gynoecium of three-five carpels. The aim of my research is to provide answers to the crucial event in floral evolution of the core eudicots by a comparative study of different families in the basal eudicots and early core eudicots. www.rbge.org.uk /rbge/web/science/research/tropdivers/basaleudic.jsp   (318 words)

Kids Be Safe : Article 'Wikipedia Tree of Life/Update of the Angiosperm Phylogeny Group'   (Site not responding. Last check: 2007-10-09) Many families were not classified to order because their positions were uncertain or unknown, and these families were listed under the supraordinal groups where they were known to belong or at the end of the system in a list of families, probably eudicots, of uncertain position. It is sister to the magnoliids + eudicots in the six-gene compartmentalized analysis (84% bootstrap support; Zanis et al., 2003), but this is the only analysis that has provided support for the placement of this family. EUDICOTS Relatively few changes have been made among the families/orders forming a grade at the base of the eudicots. www.kidsbesafe.org /DisplayArticleFull755983.html   (9557 words)

[No title]   (Site not responding. Last check: 2007-10-09) Herbaceous eudicots for a ring of discrete vascular bundles around the pith, e.g. In many monocots and some eudicots, the base of the leaf is expanded into a sheath that covers the internode, e.g. Collenchyma and sclerenchyma cells may be present beneath the epidermis of the vein ribs or larger veins in eudicots and magnoliids. www.cbu.edu /~esalgado/BIOL216/chapter26.doc   (2805 words)

[No title] OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; OC euphyllophytes; Spermatophyta; Magnoliophyta; eudicotyledons; OC core eudicots; Rosidae; eurosids I; Fabales; Fabaceae; Papilionoideae; OC Canavalia. OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; OC euphyllophytes; Spermatophyta; Magnoliophyta; eudicotyledons; OC core eudicots; Rosidae; eurosids I; Fabales; Fabaceae; Papilionoideae; OC Dioclea. OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; OC euphyllophytes; Spermatophyta; Magnoliophyta; eudicotyledons; OC core eudicots; Rosidae; eurosids I; Fabales; Fabaceae; Papilionoideae; OC Cratylia. bips.u-strasbg.fr /fr/Products/Databases/BAliBASE2/ref8/test/lectin_1_ref8.rsf   (8005 words)

Monocots - Jeremy Flynn and Jill Lucas   (Site not responding. Last check: 2007-10-09) Seeds: monocots have one cotyledon, eudicots have two (hence, their names). Leaves: monocots often have parallel venation, eudicots have a mesh or net of veins. Roots: monocots have fibrous roots, eudicots may have a taproot; they also differ in the arrangement of xylem and phloem. www.millwood.ednet.ns.ca /biology/Bio11/monocots/structure.html   (100 words)

[No title]   (Site not responding. Last check: 2007-10-09) Monocots and eudicots Two major groups of angiosperms. Eudicots usually have net-like veins, floral parts in 4’s or 5’s, and taproots. Examples of eudicots: violet, oak tree, bean, rose. socrates.berkeley.edu /~akerr/bio1b/Bio1B-midterm1-review.doc   (832 words)

Gunnerales are sister to other core eudicots: implications for the evolution of pentamery -- Soltis et al. 90 (3): 461 ... Gunnerales are sister to other core eudicots: implications for the evolution of pentamery -- Soltis et al. Drinnan A. Crane S. Hoot 1994 Patterns of floral evolution in the early diversification of non-magnoliid dicotyledons (eudicots). Fishbein M. Hibsch-Jetter D. Soltis L. Hufford 2001 Phylogeny of Saxifragales (angiosperms, eudicots): analysis of a rapid, ancient radiation. www.amjbot.org /cgi/content/full/90/3/461   (5902 words)

Easy Encyclopedia - Online Encyclopedia. Knowledge is Power The names come from the number of embryonic leaves, called cotyledons, found within the seed, but there are other notable differences (see "How to distinguish a monocot from a dicot"). The dicots are now considered a paraphyletic group, though most belong to a monophyletic subgroup called the eudicots or tricolpates. The classification of flowering plants has undergone considerable revision as ideas about their relationships change. www.easyencyclopedia.com /encyclopedia/f/fl/flowering_plant.html   (324 words)

DAM - text file for Angiosperm Matrix Ranunculales are one of three ranunculid lines in the whole list, one of two in the priority 1 list. We kept two priority 1 taxa because Ranunculidae may be the sister group of all other eudicots, and these taxa may span the basal node in ranunculids. Trochodendron: Trochodendrales plus probably Buxaceae, one of the main lines between the base of eudicots and the split between the "rosid" and "asterid" lines. ucjeps.berkeley.edu /bryolab/GPphylo/Tracheophytes/angiotext.html   (926 words)

[No title] Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliophyta; eudicotyledons; core eudicots; Rosidae; eurosids I; Fabales; Fabaceae; Papilionoideae; Phaseoleae; Vigna. Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliophyta; eudicotyledons; core eudicots; Rosidae; eurosids I; Rosales; Rosaceae; Rosoideae; Fragaria. Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliophyta; eudicotyledons; core eudicots; Rosidae; eurosids I; Fabales; Fabaceae; Papilionoideae; Vicieae; Pisum. www.inf.ethz.ch /personal/cgina/courses/compbio2004/StringAlignment/Problem2.db   (3915 words)

[No title]   (Site not responding. Last check: 2007-10-09) Eudicots appeared in the lower Cretaceous about 127 million years ago and their origin is less clear. Early eudicots probably had small, simple flowers, with sepals and petals not clearly differentiated. The eudicot family Asteraceae is also known as the Compositae. www.cbu.edu /~esalgado/BIOL216/chapter22.doc   (4032 words)

FGP: Taxon Sampling Rationale Diversity of floral organ structure – The evolutionary gaps between gymnosperms, monocot, and eudicot model systems are enormous, particularly from the perspective of floral evolution. In contrast, in most eudicots, numbers of floral parts are low (i.e., four or five) and fixed, and floral organs are distinct and arranged in whorls, suggesting that the basic floral Bauplan became canalized during the early diversification of the eudicots (e.g., Endress, 1987, 1994; Albert et al., 1998, Zanis et al., in press). Eschscholzia – Inclusion of early-diverging eudicots is critical in that the basic floral Bauplan seems to remain open or flexible through these lineages—it is only in the core eudicots that extensive canalization is evident. fgp.bio.psu.edu /fgp/taxa/rationale.html   (3500 words)

New Hot Paper Comment by Douglas and Pamela Soltis   (Site not responding. Last check: 2007-10-09) A new discovery—resolving the basalmost relationships among core eudicots is an important finding for those interested in angiosperm evolution. Gunnerales (a small, enigmatic group) was found to be the closest relatives of the core eudicots—the core eudicots are most flowering plants and include asterids and rosids; they have flower parts in multiples of 4s or 5s. However, gunnerales have flower parts arranged in pairs (dimerous), indicating that this was the evolutionary precursor floral type leading to the flower type found in the vast majority of flowering plants. www.esi-topics.com /nhp/2004/september-04-Soltis.html   (446 words)

Litt, Amy* and Vivian Irish.   (Site not responding. Last check: 2007-10-09) Phylogenetic analysis shows that the AP1 and FUL lineages diverged near the base of the monophyletic core eudicots, and can be distinguished by different conserved amino acid motifs in the C-terminal domain of the protein. Since AP1 has been implicated in specifying perianth identity in core eudicots, the absence of AP1-like genes from other species implies that other genes carry out this role. Examination of expression patterns of AP1/FUL family members from a variety of angiosperm species is being used to address the potential functional diversification of this gene family; preliminary results will be discussed. www.botany2002.org /section2/abstracts/16.shtml   (286 words)

Fagales Note that the actual level to which many of these features, particularly the more cryptic ones, should be assigned is unclear, because some taxa basal to the [magnoliid + monocot + eudicot] group have been surprisingly little studied. Furthermore, details of relationships among gymnosperms will affect the level at which some of these characters are pegged. Fagales are the core of the old "Englerian" Amentiferae which have since been demolished, members finding resting places among many otherwise entirely unrelated groups within the Eudicots such as Saxifragales, Malpighiales, Proteales, and Rosales (Qiu et al. www.mobot.org /MOBOT/Research/APweb/orders/fagalesweb.htm   (3350 words)

Ovid: Soltis: Nature, Volume 402(6760).November 25, 1999.402-404 Major clades within the core eudicots are Saxifragales as sister to the remaining rosids; Caryophyllales; and asterids, which comprise Cornales, Ericales, euasterids I and euasterids II. Within the eudicots, the branching order of the major clades is fairly clear, but levels of support could be increased by additional data. Finally, although the core eudicots form a clade (JK 100%), the relationships among rosids, Caryophyllales, asterids and a number of smaller clades lack substantial JK support. www.botany.utoronto.ca /courses/bot307/D_Families/Soltisetalarticle.html   (2146 words)

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