Davis, Peter Hadland <br/><br/>
The identification of flowering plant families, including a key to those native and cultivated in north temperate regions / 
P.H. Davis, J. Cullen. 
 - 3rd ed 
 - Cambridge :  Cambridge University Press,  c1989. 
 - x, 133 p. : ill. 
<br/><br/> Includes bibliography, glossary and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Angiosperms--Identification<br/>Flowers--Identification