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of course, there are further problems with species, and for many biologists strict monophyly is a less important criterion at this level (see much of the discussion in Hörandl 2006). Genera can often be pegged to above the level at which hybridization ... Given the increasing support for the outlines of angiosperm phylogeny,
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www.mobot.org/MOBOT/Research/APweb/welcome.html
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According to the foremost authority on angiosperm diversity and phylogeny Dr. R.F. Thorne (The Botanical Review Volume 58: 225-348, 1992), the total number of different flowering plant families is 437. This great number of families is subdivided into 400 subfamilies, 12,650 genera and 233,885 species.
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waynesword.palomar.edu/trmar98.htm
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Flowering plant - Wikipedia, the free encyclopedia
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The flowering plants or angiosperms ( Angiospermae or Magnoliophyta ) are the most diverse group of land plants. The flowering plants and the gymnosperms are the only extant groups of seed pla...
en.wikipedia.org/wiki/Flowering_plant
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The angiosperms, or flowering plants, are one of the major groups of extant seed plants and arguably the most diverse major extant plant group on the planet, with at least 260,000 living species classified in 453 families (Judd et al., 2002; ... Amborella and the root of the angiosperm evolutionary tree...
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tolweb.org/Angiosperms/20646
tolweb.org/Angiosperms/20646
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Look around you. You are surrounded by life - some of it you can see, some of it you can't see. Species diversity is the variety of life forms found on earth.
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www.nhptv.org/natureworks/nwep13.htm
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The rapid diversification and ecological dominance of the flowering plants beg the question "Why are there so many angiosperm species and why are they so successful?" A number of equally plausible hypotheses have been advanced in ...
http://www.amjbot.org/cgi/content/abstract/96/1/366
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Direct measurements of intervessel pit membrane hydraulic resistance in two angiosperm tree species1 ... The area-specific resistance of pit membranes (rmem) was higher than modeled or measured values obtained previously for hardwood species, with rmem of 5.24 x 103 MPa·s·m–1 for Fraxinus and 2.56 x 103 MPa·s·m–1...
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www.amjbot.org/cgi/content/abstract/93/7/993
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In two species of largely self-fertilizing annual plants, minimal estimates of such mutation rates were found to be 0.24 to 0.87 per sporophyte genome per generation, but confidence intervals exceeded 1.0 in each of the four populations.
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www.sciencemag.org/cgi/content/abstract/267/5195/226
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There are over 250,000 species of angiosperms. Angiosperms are flowering plants. They make up around 80 percent of all the living plant species on Earth. - NatureWorks ... There are about 200,000 species of dicots. Monocots These angiosperms start with one seed-leaf. The main veins of their leaves are usually...
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www.nhptv.org/NATUREWORKS/nwep14f.htm
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