H-O-T-T-O-O-A-K: The air is warming, the blossoms are showing off, and everyone you know is sneezing. You might have heard seasonal allergies blamed on “botanical sexism”—but that’s not how trees work ...

Animal pollination: Bees ... It has tassels (male flowers) and ears (female flowers) on the same plant. ・Dioecious plants: ...