Describe various types of symmetry of flower based on the arrangement of floral parts.

Describe various types of symmetry of flower based on the arrangement of floral parts.
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Ans: On the basis of this character, floral symmetry is of the following three types.

I. Spiral : The free sepals, petals, stamens and carpels are arranged spirally over the conical or convex thalamus. Ex: Magnolia

II. Hemispiral: Sepals and Petals are in cycles. Stamens and Carpels are arranged in spiral manner over the conical or convex thalamus. Ex: Annona, Polyalthia.

III. Cyclic: All the four floral parts are arranged in cycles over the thalamus.

Ex: Hibiscus, Datura
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