Stebbins, G. Ledyard <br/><br/>
Flowering plants : evolution above the species level 

 - Cambridge,Mass.  Belknap 
 - xviii, 397 s. : ill. 
<br/><br/><label>Subjects--Index Terms: </label>EVOLUTION SPERMATOPHYTA 
<br/><br/><label>Dewey Class. No.: </label>577