Stebbins, G. Ledyard  1906- <br/><br/>
Flowering plants  evolution above the species level 
G. Ledyard Stebbins 
 - Cambridge, Mass.  Belknap Press of Harvard University Press  1974 
 - xviii, 399 p.  ill.  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Evolution<br/>Angiosperms--Evolution
<br/><br/><label>Dewey Class. No.: </label>582  / .13  / 0438