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.

进化史上，那些非常早期的蜜蜂能一直以开之前的非开为食。早期的蜜蜂能以蕨类或松树等不开的为食。