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So necessary are the visits of bees to many papilionaceous flowers, that their fertility is greatly diminished if these visits be prevented.

蜜蜂对许多的访问是此必要, 果阻止这些访问, 它们的生育能力会大大降低。

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Many flowers, on the other hand, have their organs of fructification closely enclosed, as in the great papilionaceous or pea-family; but these almost invariably present beautiful and curious adaptations in relation to the visits of insects.

另一方面,许多的果实器官紧密科或豌豆科;但这些几乎总是呈现出与昆虫来访有关的美丽而奇特的适应。

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