14 



AQUATIC PLANTS IN POND CULTURE. 



The six plants so far mentioned have been listed in the order of 

 esteem as held by the superintendent of the Fish Lakes. The 



Fig. 9. — Waterweed {PJiUotria canaden- 

 sis). Found nearly throughout North 

 America, except extreme north. 

 (After Britton & Brown.) 



Fig. 10. — Water stargrass (Hcteran- 

 thera duhia). Found in still 

 water, Ontario to Oregon, south to 

 Florida and Mexico. Also in Cuba. 

 (After Britton & Brown.) 



remainder of the list for this station does not follow any par- 

 ticular order, but, as before, the good or bad qualities the super- 

 intendent believed the plants 

 to possess are noted in each 

 case. 



The waterweed {Ph'dotria 

 canadensis), which groAvs in 

 2 to 4 feet of water, extending 

 to, but not above, the surface, 

 is a good food producer, a 

 good oxygenator, good for 

 shelter, and is valuable for 

 its early growth. It also 

 makes a good aquarium plant. 

 It is dangerous in ponds, 

 however, owing to its dense 

 growth. 



Water stargrass {Heteran- 

 thera duhia) has the same 



Fig. 11.— Needle spike-rush (Eleocharis acicu- merits aS the WaterWCed, be- 



laris). F'ound in wet soil throughout North . t J^ A ,,,,^,1.,««„ 



America, except in extreme north. Also in IHg ^ S^od food produCCr, 



Europe and Asia. (After Britton & Brown.) fai^ oxygenator, and excellent 



for the shelter it affords and for its early growth. It is found in 

 water 1 inch to 4 feet deep. 



