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Species and Infraspecific Taxa
The Evolution of Characters
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aceae adaptive alkaloids Amer ancestral angiosperms anthers aquatic archaic Arnold Arbor Asteraceae Asteridae axile basal bitegmic Carlquist carpels Caryophyllales cells characters chromosomes cladistic cladogram classification connate corolla corolla-lobes cotyledons Cretaceous defined consists derived developed dicots dicotyledons Dilleniidae diploid distinct ecological embryo embryo-sac endosperm evidence Evol evolution evolutionary families floral anatomy flowers fossil record fruit Gard genera genetic genus gymnosperms gynoecium habitat Hamamelidae herbaceous herbs hybridization inflorescence iridoid iridoid compounds Jahrb leaves less locule Magnoliales Magnoliidae Missouri Bot monocots monocotyledons Myrtales nectaries Nymphaeales origin ovary ovules parietal perianth petals phloem phyletic phylogenetic phylogeny pistil placentation plants pollen Pollen morphology pollen-grains primitive producing reduced relationships Rosidae seeds seldom Selected References sepals significance single solitary sometimes southeastern United specialized species sperms stamens stipules structure style subclass Synoptical Arrangement Syst taxa taxon taxonomic taxonomists tepals tetraploid tropical typically unisexual unitegmic usually vascular vessels woody xylem