Hybridization and the nature of species in higher plants / 
Peter H. Raven. 
 - pp.3-10 ;  28cm. 
<br/><br/> Reprinted from: Canadian Botanical Association. Bulletin supplement to vol. 13,1980, pp. 3-10. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Evolution.<br/>Evolution (Biology).<br/>Plant hybridization.
<br/><br/><label>Dewey Class. No.: </label>581.38