The combination of various features, such as shape, color, and ease of access to pollen and nectar, makes each flower more or less suitable for specific types of insects.

For example, open-corolla flowers, like buttercups , offer pollen and nectar in an easily accessible way to a wide variety of pollinators, from bees to flies .

On the other hand, flowers with a more complex corolla , such as common sage, hide their resources behind an elaborate structure: only certain insects with specific adaptations can reach the nectar. This selectivity creates a closer relationship between the plant and its pollinators, reducing competition and fostering a special collaboration.

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