98 HARDY AQL'ATICS. 



Pistia stratiotes. (Water Lettuce). A floating plant; leaves wedge- 

 shaped, two to five inches long-; of a delicate pale green, covered with fine 

 hairs. Delights in warmth and shade. 



Sagittaria lancifolia, (syn. S. falcata). A strong grower; and, unUke 

 the more familiar species, the leaves are lanceolate, never sagittate; the 

 scape three to five feet high, and covered with large, pure white flowers. 



S. montevkliensis. (Giant Arrowhead). Truly, a Giant Arrowhead; 

 leaves flfteen inches long on tapering stalks four to five feet high ; flower 



Myriophyllum proserpinacoides. 



scape massive and taller than the leaf stalk 

 with a dark blotch at the base of each petal. 



Thalia dealhata. A sub-aquatic plant ; very ornamental 

 subject; leaves ovate on long petioles; flowers purplish, small 



The flowers are pure white, 

 a subtropical 



Acorus calamus. The well-known Sweet Flag, 



A. gramineus variegatus. A diminutive form like A. calamus, with grass- 

 like leaves, beautifully variegated, constant. Will not scorch in summer, and is 

 equally good in shady spots. 



