| In which of the following aestivation of sepals/petals one margin covers the other and its margin is covered by previous one? |
| a) | Valvate | b) | Twisted |
| c) | Imbricate | d) | Quincuncial |
| (b)In twisted aestivation, sepal/petals edges are overlapping each other (i.e., on margin cover the other and its margin is covered by previous one), whereas in valvate the margins of sepals and petals only touch to each other. |