Alstroemeria flowers in UV and daylight

Alstroemeria flowers in UV and daylight

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Caption: Alstroemeria sp. flowers in ultraviolet (UV) light (right) and daylight (left). At right areas either reflect (light) or absorb (dark) the UV light. The light and dark UV patterns are known as 'nectar guides' and help to attract pollinating insects, which can see UV light. Humans are unable to see these patterns.

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