Benson, Lyman David,  1909- <br/><br/>
Plant classification / 
Lyman Benson ; Principal plant dissections and illus. by Jerome D. Laudermilk. 
 - Boston :  Heath,  c1957. 
 - 688 p. :  ill. ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Classification.
<br/><br/><label>Dewey Class. No.: </label>581  / BEP 1957