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Corona
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Photographer: John MacDougal

Diversity: Passiflora tulae

The corona can have many shapes, from long purple-banded filaments to very small white teeth around the opening of the floral tube. Passiflora tulae, a species endemic to Puerto Rico, has developed a tubular structure by the fusion of its coronal filaments. The effect is the same as a prolongation of the floral tube, and shows another evolutionary pathway to hummingbird pollination. Many species are endemic in the Caribbean.

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