152 NATURAL HISTORY BULLETIN. 



LOPHOTOCARPUS T. Durand. Index Gen. 

 PL, 627 (1888). 



1. L. CALYCINUS (Engelm.) J. G. Smith in Mem. Torr. 

 Bot. Club, V., 25 (1894). 

 Sagittaria calycinus Engelm. in Torr., Bot. Mex. Bound., 



212 (1858). 



Wats, and Coult., Gray's Man., 6th ed., 556; Cont. to U. 

 S. Nat. Herb., II., 455. 



Not before reported from the State and very rare within 

 our limits. 



Muscatine, margin of a pond just above the city, Repfiert. 



HYDROCHARIDACEiE. 

 EL ODEA Richard. Mich., Fl. Bor. Am., I., 20 (1803). 



1. E. canadensis Rich, and Michx. Fl. N. Am., L, 20 ( 1803) . 

 Anachans canadensis Planch. Ann. Mag. and Nat. Hist., 

 2nd Ser., I., 86 (1848). 



Wats, and Coult., Gray's Man., 6th ed., 496; Arthur, Fl. 

 Iowa, 31; Upham, Fl. Minn., 139. 



Frequent throughout the State in slow-flowing streams. The 

 staminate flowers are very rarely seen. A few were collected 

 by the writer near Armstrong, in July, 1882. 



Emmet county, Cratty ; Iowa City, Macbride; Decorah, 

 Holway ; Ames and Charles City, Arthur ; Ft. Dodge, Bessey; 

 Spirit Lake, Hitchcock; Muscatine, Rcffcrt; Hancock county 

 and Cedar Rapids, Shimek. 



VALLISNERIA Linn. Sp. PI. (1753). 

 1. V. spiralis Linn. Sp. PL, 10 15 (1753). 



Wats, and Coult., Gray's Man., 6th ed., 496; Arthur, Fl. 

 Iowa, 31; Macmillan, Metas. Minn. VaL, 46. 



Rather rare in ponds and lakes, or slow streams. August. 



Independence, Bluffton and Iowa City, Macbride; Iowa 

 Lake, Emmet county, Cratty; Ames and Storm Lake, Bessey ; 

 Mud Lake. Story county, Hitchcock ; Mason City, Shimek. 



