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what is the significance of the nectar spurs in the wild columbines (genus Aquilegia)?    The...

what is the significance of the nectar spurs in the wild columbines (genus Aquilegia)?
   The spurs evolved many times from an ancestor without nectar spurs, each time after adapting to a new habitat.
   Nectar spurs evolving in the ancestor of Aquilegia permitted them to use new pollinators, allowing them to diversify through adaptive radiation into new habitats

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The evolution of length of nectar spurs (which is the plant's nectar tubes) had given rise to long length tubes so that the pollinators with long tongues can reach them easily. the spurs evolved several times from no Nectar spurs to long length nectar spurs by adapting themselves. This adoption made the pollination of these flowers easy allowing them to diversify into new habitats. these spurs being so efficient in adaption to the pollinator's needs made these flowers diversify.

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