Benson, Lyman David,  1909- <br/><br/>
Plant classification / principal plant dissections and ill. by Jerome D. Laudermilk. 
Lyman Benson ; 
 - 2nd ed. 
 - Lexington, Mass. :  Heath,  [c1979]. 
 - xxiii, 901 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Classification.