Early Flowers and Angiosperm Evolution, Else Marie Friis, Peter R. Crane, Kaj Raunsgaard Pedersen, pp. 301, Cambridge University Press, 2011, ISBN 9781139496384, ... The Proteaceae comprise more than 1700 species in about 80 genera. They are shrubs, or more rarely trees or herbs, with alternate or rarely opposite leaves. The family is widely distributed in tropical and subtropical regions of the Southern Hemisphere ...
