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Chapter: 11th Botany : Chapter 4 : Reproductive Morphology of Angiosperm

Arrangement of whorls

The position of perianth (sepals, petals, tepals) parts relative to one another is called perianth arrangement.

Arrangement of whorls

 

The position of perianth (sepals, petals, tepals) parts relative to one another is called perianth arrangement.

 

1          Cyclic or whorled: All the floral parts are arranged in definite whorls. Example: Brassica,Solanum.

 

2          Acyclic or spiral: The floral parts are arranged in spirals on the elongated fleshy torus. Example: Magnolia.

 

3          Spirocyclic or hemicyclic: Some parts are in whorls and others parts are in spirals. Example: Nymphaea, Annona, Polyalthia

 

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11th Botany : Chapter 4 : Reproductive Morphology of Angiosperm


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