12 AQUATIC PLANTS IN POND CULTURE. 
makes also a good aquarium plant. Found in 2 to 5 feet of water, 
and reaching to the surface. 
Fig. 5.—Curled-leaved pondweed (Potamogeton crispus). Found in fresh, brackish, or 
even salt water, Massachusetts to Pennsylvania and Virginia. Also in Europe. (After 
Britton & Brown.) 
Another Potamogeton (foliosus), the leafy pondweed, also good as 
a food producer, oxygenator, and for shelter, is found in 2 to 4 feet of 
Fic. 6.—Leafy pondweed (Potamogeton foliosus). Niagara Falls to Michigan and Cali- 
fornia. (After Britton & Brown.) 
water, extending to but not above the surface. This plant comes 
fourth in the estimation of the superintendent. 
