Flowering Plants: Origin and Dispersal

adaptation affinity Africa Albian amongst anatomy ancestors angio angiosperms Annonaceae apocarpous Arnold Arbor arose Assam Axelrod Bailey basic Bennettitales bisexual carpels ceae centre characteristic China climate common origin Cretaceous Cretaceous period cycads Degeneria Degeneriaceae dicots dicotyledons distribution Drimys Eames earliest angiosperms eastern endemic endemic families endemic genera endosperm Eocene evidently evolution evolutionary Fagaceae ferns Flacourtiaceae flowering plants forest forms fossil floras genetic genus gymnosperms gynoecium Hallier Hamamelidales insects integument Islands isolated Lardizabalaceae Late Cretaceous Lauraceae leaf Magnoliaceae Magnoliales microsporangia monocolpate monocots morphology neoteny North America northern Nymphaeaceae Nymphaeales occur ovules Palaeocene perianth phylogenetic phytogeographical pollen pollen grains populations primitive angiosperms primitive families primitive type Probably derived Ranunculales region scalariform seed-ferns seeds south-east Asia southern specialised species sperms stamens strobili structure SUBKINGDOM subtropical flora Superorder Takhtajan temperate flora Tertiary Tetracentron Trochodendron tropical unilacunar node unisexual vegetation vesselless Winteraceae wood xylem zone