66 MINNESOTA BOTANICAL STUDIES. 



XI. FURTHER EXTEIN SIGNS OF PLANT RANGES. 



Edmund P. Sheldon. 



Potamogeton lieterophylhis Schreb. forma inyriophyl- 



lus (Robbing) Morong. Naiad. N. Am. 24. 1893. 



The following localities are to be added to those reported on 

 page 14 of this Bulletin : Ponds near the tracks of the Brain- 

 erd and Northern Minn. R. R. about five miles north of Stony 

 Brook, and in a small lake east of Upper Gull lake, Cass county, 

 Minn. (C. A. Ballard, July and Aug., 1893). 



Potamogeton rutilus Wolfg. in R. & S. Mant. 3:362. 

 1827. 



First reported in Minnesota by Morong in his Naiadacese of 

 North America as collected by L. H. Bailey in Vermilion lake. 

 Collected also in lake Edna, Cass county, Minn. {A. P. Ander- 

 son, Aug., 1893. ) 



Potamogeton major (Fr. ) Morong. Naiad. N. Am. 41. 

 1893. 



Collected in Martin county, Cratty. Found also in Gull lake, 

 Cass county, Minn. {A. P. Anderson and C. A. Ballard, July, 

 1893. 



Naias marina Linn. Spec. 1015. 1753. 



Not previously reported from Minnesota. 



The localities given for this plant by Morong in his Naiad- 

 acese of North America are as follows: "The species is rare in 

 North America. Canoga Marshes and Cayuga lake, N. Y. 

 {Morong, Dudley); Florida {Chap. Fl.)\ Utah (Parr?/); Lower 

 Calif. (Palmer). Attributed by Watson in Bot. Calif, to Clear 

 lake {Bolander) and Huntington Valley, Nev. ( Wheeler). Cuba. 

 Occurs in Europe and Asia." 



It was found submerged in about one foot of water in a pond 

 near lake Minnewaska, Pope county, Minn. (B. C. Taylor, 

 Aug., 1891). 



