loo Fresh Water Aquarium 



the above species. The young plant resem- 

 bles the Valisneria in appearance, but its 

 leaves are thicker, and are triangular in 

 cross-section. The perfect leaves are not ar- 

 row-shaped, but of spoon, or long lance-head 

 shape. In good light the plant remains 

 green during the better part of the winter 

 and the flowers appear as long as the leaves 

 last. 



Arrow-wort {Sagittaria montevidensis) , 

 from Montevideo, is a very fine plant for the 

 aquarium, being of a strong growth, with 

 leaves of the true arrow-head shape. The 

 flowers are large and white with dark pur- 

 ple blotches. In a favorable, that is, in a 

 very sunny location, it remains green all 

 winter. 



Sanford's Arrow-wort (Sagittaria sanfordii) 

 with broader leaves, and Sagittaria subulata, 

 with smaller and finer leaves, are both of 

 value for the aquarium, but not more so 

 than other more or less well known varieties. 



Heart-leaved Pickerel Weed (Pontcderia 



