NOTES ON THE AQUATIC PHENOGAMS OP^ IOWA, i^i 



2. S. A>iDROCLADUM i^Biigrliii.) Muroii(>; Bull. Torr. Bot. 



Club, XV., 78 (1888). 



S. simplex Huds. var. androcladnm Engelm. in Gray's 



Man., 5th ed., 481 (1867). 



Wats, and Coult., Gray's, Man. 6th ed., 548; Arthur, Fl. 

 Iowa, 30; Macmillan, Metas. Minn. Val., 33. 



Heads when mature about one inch in diameter, being 

 intermediate in size between the preceding and the next. 

 Ponds; rare. July, August. 



Davenport, Arthur''sFL lozua, No. 775; Wilton, Hitchcock. 



3. S. EURYCARPUM Eiigcliii. Gray's Man., 2nd ed. (1852). 



Wats, and Coult., Gray's Man., 6th ed., 548; Arthur, Fl. Iowa, 

 30; Hitchcock, Ames Fl. 521 ; Macmillan, Metas. Minn. Val., 33. 



Frequent throughout the state on the margin of ponds and 

 lakes, usually being found among a rank growth of grasses 

 and sedges. Mature heads of fruit are often 13^ in. in diam- 

 eter. Jul}', August. 



Emmet county, Cratty; Iowa C\\.y , Macbridc ; Ames, Hitch- 

 cock; Humboldt, Besscy: Hamilton county, Rolfs; Dickinson 

 county, Hitchcock : Washington and Winnebago counties, 

 Cedar Rapids, Shiinck. 



NAIADACE^. 



NAIAS Linn. Spec. PL, 1015 (1753). 



I. N. FLExiLis ( WilId.)Rost. d- Schmidt, Fl. Sed. 384 (1824). 



Morong, Naiad. N. A., 59; Wats, and Coult., Gray's Man., 

 6th ed., 566; Macmillan, Metas. Minn. Val., 40; Hitchcock, 

 Ames Fl., 523; x\rthur, Fl. Iowa, 30. 



A homely little plant, growing entirely under water, and 

 widely distributed throughout the northern hemisphere. Ponds 

 and slow streams. July, August. 



Lake Cairo, Besscv; Emmet county, Cratty; Story and 

 Dickinson counties, Hitchcock: Muscatine Reppert; Hancock 

 county, Shinick. 



