l8 AMERICAN MIDLAND NATURALIST 



4, p. 43, (1845); Potamogeton compressus J. E. Smith, Engl. Bol. 

 3, pi. 418, (1794); not Linn. (1753); Potamogeton pusillus var. 

 major Fries, Novit. Ed. 2, 48, (1848). Potamogeton major Morong, 

 Mem. Torr. Club. 3, pt. 2, 41, (1893), not P. pusillus var. major 

 M. & K.. (1823). 



Lake Maxinkuckee, H. W. Clarke, Pine, Ind., Wheeler. 

 [Kalamazoo River, (Allegan Co.) Wight.] 



Spirillus foliosus var. niagarensis (Tuckerm.). 



Potamogeton foliosus var. niagarensis Tuckerm. Pot- 

 amogeton pauciflorus var. niagarensis (Tuckerm.) Morong, Mem. 

 Torr. Club. 3. 2, p. 39, (1893). Potamogeton niagarensis Tuckerm. 

 Am. Jr. Sc. (II) 7, P- 354, (1849). 



(Laporte Co.) S. Coulter. Clarke, Ind., L. M. Umbach, Wolf 

 Lake, Hammond, Ind. (Lake Co.) A. Chase. 



Spirillus pusillus (Linn.). 



Potamogeton pusillus Linn. Sp. PI. p. 127, (1753). 



Lake Maxinkuckee, H. W. Clarke, [South Haven, Mich., 

 (Van Buren Co.) L. H. Bailey] [Kalamazoo River (Allegan Co.) 

 Wight]. 



Spirillus filiformis (Pers.). 



Potamogeton filiformis Persoon, Syn. i, p. 152, (1805). 



Lake Maxinkuckee (Marshall Co.) H. W. Clarke. 



Spirillus diversifolius (Raf). 



Potamogeton diversifolius (Raf. Med. Rep. (II) 5, p. 

 354, (1898); Potamogeton hybridus Michx., Fl. Bor. Am. i, p. 

 loi, (1803), not Thuill. (1790). (Lake & Laporte Co.) Hill. 



Spirillus pectiniformis (Linn.). 



Potamogeton pectiniforme Linn. Am. Acad. II., p. 241,(1749). 



Potamogeton pectinatus Linn. Sp. PI. p. 127, (1753). 



Lake Maxinkuckee, H. W. Clarke; St. Mary's Lake, Notre 

 Dame, Ind., U. N. D. Herb. No. 9215; [Kalamazoo River, Mich. 

 (Allegan Co.) Wight]. 



Spirillus interruptus (Kitaibcl.). 



Potamogeton interruptus Kitaibel, Schultes, CEst. Fl. 

 Ed. 2, p. 328, (1814). Potamogeton flahellatus Babington, Man. 

 Bot. Ed. 3, p. 324, (185 1). 



Notre Dame, Ind. (Lake Co.) Hill. Lake Maxinkuckee, H. W. 

 Clarke. 



