Seeds are the means by which all trees except tree ferns reproduce. Tree ferns reproduce by spores.
Angiosperms-broadleaf trees and palm, pandanus, and lily trees-produce seeds by means of flowers. Some broadleaf trees, such as horsechestnuts and magnolias, produce large, showy flowers. Many others have small, plain-looking flowers. Most palm, pandanus, and lily trees have small flowers that grow in bunches. Sometimes these are brightly colored and fragrant.
The seeds of angiosperms are enclosed to form a fruit. The fruits of some broadleaf trees, such as apples and cherries, have a fleshy outer covering.