Basic Flower Structure

1. Basic Flower Structure stigma carpel gynoecium Flower is perfect Flower is monoecious locule style pollen ovary ovule anther filament stamen androecium petal corolla sepal perianth receptacle calyx Perianth is complete pedicel

2. Some Example Stories: Perfect Flowers: Pea exclusively self-pollinating Hibiscus self-pollinating if not crossed Cherry self-incompatible only outcrosses Imperfect Flowers: Begonia unisexual but monoecious Holly unisexual and dioecious Variable: Cucumber male, perfect, female, parthenocarpic

3. Basic Flower Structure stigma carpel Pistil is simple gynoecium Flower is perfect Flower is monoecious locule style pollen ovary ovule anther superior filament stamen Flower is hypogynous androecium petal corolla sepal perianth receptacle calyx Perianth is complete pedicel

4. Ovary Superior Flower Hypogynous Ovary Half-Superior Flower Perigynous Ovary Half-Inferior Flower Epigynous Ovary Inferior

5. Flower Structure - review Ranunculus acris - buttercup

6. Basic Flower Structure stigma carpel Pistil is simple gynoecium Flower is perfect Flower is monoecious locule style pollen ovary ovule anther superior filament stamen Flower is hypogynous androecium petal corolla sepal perianth receptacle calyx Perianth is complete pedicel This longitudinal section view does not allow us to consider symmetry

7. Flower Formula:Symbol Sequence to Diagram Flower Symmetry: *=radial †=bilateral * * 5, * 5, 5, * 5, 5, , * 5, 5, , 5 Number of Parts per Whorl: • sepals in calyx • petals in corolla • stamens in androecium • carpels in gynoecium Fusion within whorl: curved line over number Fusion between whorls: square bracket below numbers Attachment of flower parts relative to ovary: horizontal line

8. 1 1 Ovary Superior Flower Hypogynous Ovary Half-Superior Flower Perigynous 1 Ovary Half-Inferior Flower Epigynous Ovary Inferior