Lawrence, George H. M.  <br/><br/>
An introduction to plant taxonomy / 
George H. M. Lawrence ; illustrated by Marion Ruff Sheehan. 
 - New York :  The macmillan company,  c 1968. 
 - viii, 179 p. :  ill. ;  22 cm. 
<br/><br/> Include index. 
<br/><br/>Include bibliographical reference. 
<br/><br/>340  340 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants-- Classification--North America. 
<br/><br/><label>Dewey Class. No.: </label>582 / L431i