Most of us know eucalyptus for the fragrant blue-silver leaves that we use for decoration, but the eucalyptus gum tree offers a completely different surprise. It produces Ping-Pong-ball-size seed pods, which are themselves often used in flower arrangements. We recommend patience because when they bloom, you'll get one of these dusty rose, sea-anemone-looking flowers per stem, and they cover the whole tree. It’s magnificent.