NOTES OX THE AQUATIC PHENOGAMS OF IOWA. ^3 



Not before reported from Iowa. Ponds and slow streams 

 along Cedar River near Muscatine. June 25. 1894. Not 

 common. Herb. Reppert, No. J38. 



4. P. lonchites Tuck. Am. Jour. Sci. and Arts, 2nd Ser., 



VII.. 348 (1849)- 



P. fluitans Auc. Amer. 

 I ? \P.fuitans Roth. Fl. Germ., L, 72 (1788). 



Morong, Naiad. N. A.. 20: Wats, and Coult., Gray's Man., 

 6th ed.. 560: Macmillan, Metas. Minn. Val.. 34; Arthur, Fl. 

 Iowa. 30. 



Slow-flowing streams; common. Forms of this species 

 with the petioles of the submerged leaves 6 to 8 in. long were 

 collected by Mr. Reppert in the Mississippi River near Mus- 

 catine. 



West Fork of the Des Moines at Estherville, C ratty : Ames, 

 streams around Caiio Lake, Hitchcock: ponds and sloughs 

 along Cedar River, Reppert; Iowa Citv, Linn and Lee coun- 

 ties. Shi inch: Charles City, Arthur: Storm Lake. Bessey; 

 Waterloo and Spirit Lake, Hitchcock; Hamilton county, Rolfs. 



5. P. HETEROPHYLLUS ScJll'cb. Spic. Fl. Lips, 2 1 (1771). 



P. grarnineus^ var. keteropkyllus Fries. Nov. 2nd ed., 



35 (1828). 



Morong, Naiad. N. A., 23: Wats, and Coult., Gray's Man., 

 6th ed.. 561; Hitchcock, Ames Fl., 522; Macmillan, Metas. 

 Minn. Val . 35. 



An extremely variable species, preferring quiet water; rare 

 within our limits. When the ponds and sloughs dry up this 

 species often sends up shoots bearing several broad green 

 leaves, in this respect resembling P. illinoensis. 



Sloughs near Armstrong, Emmet countv, C ratty: Ames, 

 rare. Hitchcock. 



6. P. illinoensis Morong. Bot. Gaz , V., 50 (1880). 



Morong, Naiad. N. A., 27; Wats, and Coult., Gray's 

 Man., 6th ed., 561: Macmillan, Metas. Minn. Val., ],6; 

 Arthur, Cont. FL Iowa, V.; Hitchcock, Ames, Fl., 522. 



