BOTA2000 Lecture Notes - Lecture 10: Tepal, Magnoliales, Amborella
Document Summary
Dominant plant type with 250 000 species successful because of mutualistic co evolution of animals as pollinators and seed dispersers. Flower is a determinate shoot bearing sporophylls. Flowers consist of whorls (up to four) Flower structure can be written as a (cid:858)fo(cid:396)(cid:373)ula(cid:859) Cladisticanalysis based on morphology, rrna, rbcl, & atpb sequences. Six informal higher groups containing the accepted orders and unplaced families of flowering plants. The ana grade (three basal orders: amborellales, nymphaeales, austrobaileyales. Leaves simple, entire flower parts in threes. Stamens with broad filaments carpels separate (apocarpous) Nectaries absent but insect pollinated small embryo. Aspects of flower morphology similar to ana group include: One of most successful groups with 60 000 species. Several morphological features common to the monocots. Comprise of flowering plants (65 000 species) 12 orders several families of aquatic and se(cid:373)i a(cid:395)uatic plants. Asparagales (group of 12 large flowered families) Commelinoids (4 orders, 30 families) large group with reduced, inconspicuous flowers, complex inflorescences.
