Plant Anatomy Hypanthium. The petals or the sepals are fused into a cup or tube. Flowers can be grouped into the three categories which describe the position of the pistil relative to other floral organs and the presence or absence of a hypanthium tissue composed of fused petals calyx and stamen Figures 8-10.
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These are present in several plant families such as Rosaceae Grossulariaceae and Fabaceae. Anther bract carpel fecundation filament flowering plants hypanthium. The flower does not have a hypanthium.
Fusion of sepals and petals.
Horns in hoods Asclepias NA. A hypanthium floral cup is present but it is tightly fused to the ovary. The flower is produced near the base of the plant. The stem houses a vascular system of tubes that supply water and other essential nutrients throughout the plant.
