Those very early bees might have been feeding on non-flowering plants that preceded flowering plants during evolutionary history. The early bees could have fed on nonflowering plants such as ferns or pine trees.

在进化史上，那些非常早期的蜜蜂能一直以开花植之前的非开花植。早期的蜜蜂能以蕨类植或松树等不开花的植。