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1. A whorl of sepal forms the calyx.
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1. A whorl of petals forms the corolla.
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2. It is the unit member of the outermost whorl.
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2. It is the unit member of the whorl inner to the petal.
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3. It is green in colour.
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3. It is brightly coloured.
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4. It is leaf like structure.
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4. It is petalloid
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5. If the sepals are absent the condition is known as asepalous.
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5. If the petals are absent the condition is known as apetalous.
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6. Calyx protects the inner whorls in bud condition.
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6. Corolla attracts the agents of pollination.
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