Thomas, Graham Stuart, <br/><br/>
Perennial garden plants or the modern florilegium  a consice account of herbaceous plants, including bulbs, for general garden use 
written and illustrated by Graham Stuart Thomas.. 
 - New York  David McKay Co.  1976 
 - xvi, 389 pages    illustration (some col.) ;    26 cm. 
<br/><br/> Includes index. 
<br/><br/>p. 343-354. 
<br/><br/><label>ISBN: </label>0460039938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perennials