Area and the rapid radiation of Hawaiian Bidens (Asteraceae)

Remote islands have played a central role in the development of evolutionary theory, particularly with regard to the factors responsible for speciation and adaptive radiation (Darwin, 1859; Lack, 1947; Carlquist, 1974; Schluter, 2000). The Hawaiian Islands (about 4000 km from the nearest land mass) are noteworthy in this regard, as adaptive radiation is Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA 94305, USA, Department of Botany and PCSU, University of Hawaii, Manoa, 3190 Maile Way, Honolulu, HI 96822, USA, Department of Botany, Smithsonian Institution, PO Box 37012, Washington, DC 20013-7012, USA