Practice question

Twisted aestivation also called contorted involves each petal overlapping its neighbour on one side and being overlapped on other side creating spirally arranged corolla resembling pinwheel pattern. Hibiscus rosa-sinensis exhibits prominently twisted corolla with large showy petals, also characteristic of cotton Gossypium and ladies finger Abelmoschus family Malvaceae. Mustard valvate with no overlap, Calotropis also valvate, pea vexillary papilionaceous. Twisted mechanism protects inner androecium in bud and assists rapid unfolding during anthesis via coordinated expansion, conferring structural rigidity to large corolla optimized for pollinator visual attraction and landing platform.