Potamogeton 



POTAMOGETONACEAE 



79 



50 



Map80 



Potamogeton diversifolius Raf 



50 



Map 81 

 Potamogeton gramineus 



var. graminif olius Fries 



50 



Map 82 



Potamogeton pulcher Tuckerm. 



4. Potamogeton capillaceus Poir. Map 79. This species was reported 

 by Fernald (Mem. Gray Herb. 3: 111. 1932) as having been found by Hill 

 and by Chase in Goose Pond, near Dune Park, Porter County. This pond 

 is located mostly in section 28 about 4 miles northwest of Porter. 



Coastal Plain from Maine to Fla. and Tex., and in Ind. and Wis. ; also 

 in Cuba and Isle of Pines. 



5. Potamogeton diversifolius Raf. {Potamogeton hybridus Michx. of 

 Gray, Man., ed. 7.) Map 80. All of my specimens are from the southern 

 half of the state, although it has been reported repeatedly from the dune 

 area. The reports from the northern part of the state should probably be 

 referred to some other species. 



L. I., Pa., s. Ind., Wis., Minn., Mont., s. Oreg., southw. to Ga., Tex., Calif., 

 and n. Mex. 



6. Potamogeton gramineus L. var. graminif olius Fries. {Potamogeton 

 heterophyllus of recent authors.) Map 81. Rather frequent in shallow 

 water in our lake area. 



Throughout the greater part of N. A. 



7. Potamogeton pulcher Tuckerm. Map 82. My only specimen is from 

 a pond in Sullivan County. It has been reported from the dune area. 



Maine to Fla. and westw. to Mo. 



8. Potamogeton angustifolius Berchtold & Presl. Map 83. Rather- 

 frequent in the lakes that I have studied and probably well distributed in 

 the lake area. It has been reported from the dune area. 



Mass., Que., Wyo. to Calif., southw. to Fla. and Tex.; also in W. I., 

 Eurasia, and Africa. 



9. Potamogeton illinoensis Morong. Map 84. Infrequent in the lakes 

 throughout the lake area. 



Ind. to Minn., southw. to Mo. 



