Wind-pollinated tree in the maple family, medium in size with a broad, irregular crown. Rare among maples for its compound leaves, having three to five light- or medium-green leaflets, and dioecious habit, growing as separate male and female trees with females bearing the winged fruit typical of maples. Host for black-and-orange box elder bugs, which don’t harm the tree but can exist in large numbers.

Box elder leaves. Photo: Carol Davit.