102 AQUATICS FOR AQUARIA. SHALLOW WATER. ETC. 



Myriophyllum heterophyllum. (Water Milfoil). Submerged plant; leaves 

 green, crowded, often whorled and pinnatifid. 



M. virtkillatum. Leaves very finely pinnate, dark green; stems red. 



Nvmphiea pygmsea, white; N. p. Hehola, yellow; N. Laydekeri rosea, red. 

 See descriptions, pages 87, 89. These Water Lilies are well adapted for large 

 aquaria, and will produce their lovely flowers when growing in pots, four 

 and five inches in diameter. 



Pistia stratiotes. (Water Lettuce). Leaves two to five inches long, 

 forming a rosette of light green velvety foliage. 



Potamogeton crispus. (Pond Weed). Submerged plant; leaves bronzy 

 green, crisped, wavy. Common in streams and stagnant water. 





Stratiotes aloides. 



Sagittaria graminea. Leaves broadly linear; flowers white; often profusely. 



S. natans. Unlike the well-known Arrowhead the leaves here are strap- 

 shaped and submerged, but in shallow water the plant produces floating- 

 leaves, which are occasionally spotted; flowers white. 



Salviniu braziliensis. (syn. S. natans). A small floating plant ; leaves soft 

 green, covered with delicate hairs. 



Stratiotes aloides. (Water Aloe or Water Soldier). A submerged plant; 

 dark green spiny foliage, similar to that of a Pandanus. 



Vallisneria spiralis. (Tape or Eel Grass). Ribbon-like grass, six inches to 

 three feet long; a submerged plant, and desirable for the aquarium. 



