BOTA2000 Lecture Notes - Lecture 7: Rosids, Oxalidales, Cucurbitales
Document Summary
Dicots include monophyletic eudicots & other families (e. g. magnoliaceae, lauraceae, pip. Characterised primarily by triapertuate pollen 3 apertures are usually elongated. Perianth usually differentiated into sepals & petals (a perianth of undifferentiated tepals is the usual condition in other flowering plants except nymphaeaceae & commeliniaceae) Differentiation of outer protective sepals & inner displaying petals unites most eudicots (evolved independently in some other flowering plants) Plants often woody stipules often present endosperm usually absent or scanty ellagitannins often present (rosids lacking gallic or ellagic acid have developed other kinds of chemical defenses (e. g. capparales) Morphologically heterogeneous but many with dry stigmas, many three carpellate. Parasitic plants with three genera including rafflesia with largest of all flowers. Endoparasites of vines in tetrastigma (vitaceae) lack stems, leaves, roots, photosynthetic tissue. Only flowers emerge from roots or stems of host. Herbs, shrubs, trees, or lianas climbing by twining or tendrils. Flowers usually bisexual, radial to bilateral with a short, cup-shaped hypanthium.
