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Among flowers of Calotropis, tulip, Sesbania, Asparagus, Colchicine, Sweet pea, Petunia, Indigofera, Mustard, Soyabean, Tobacco and groundnut how many plants have corolla with valvate aestivation?

1. Five
2. Six
3. Seven
4. Eight

Correct answer: Six

Solution

Valvate aestivation in the corolla is characteristic of several members in this list, including Calotropis, Sesbania, Indigofera, and groundnut. Counting all plants from the set with valvate corolla gives six.

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