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Morphology of Flowering Plants
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The mode of arrangement of perianth lobes in bud condition is called aestivation. The aestivation observed in the calyx of Ipomoea and Catharanthus is _________.
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quincuncia
💡 Explanation:
It is also a type of twisted aestivation. In this type the perianth lobes overlap in such a manner that the margins of the two perianth lobes are completely inside, and the other two perianth lobes are outside, and in the remaining one perianth lobe, one margin is inside an the other margin is outside. Example: calyx of Ipomoea & Catharanthus.