40 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Sparganium americanum Nutt., var. androcladum (Engelm.) 

 Fernald & A. J. Eames (having the staminate inflores- 

 cence branched). 



Sparganium androcladum Morong. 



Sparganium simplex Huds., var. androcladum Engelm. 



Occasional or frequent. Marshes, about ponds and along 



streams. July — Aug. 



Sparganium lucidum Fernald & A. J. Eames (shining). 



Rare. Shallow water of pool, Hartford (H. S. Clark & 

 Weatherby). Late Aug. — Sept. 



Sparganium diversifolium Graebner (various-leaved). 

 Sparganium simplex Gray's Manual ed. 6 in great part. 



Occasional. Borders of ponds and streams. July — Aug. 



Sparganium diversifolium Graebner, var. acaule (Beeby) 

 Fernald & A. J. Eames (stemless). 

 Rare. Wet places with the typical form. July — Aug. 



Sparganium angustifolium Michx. (narrow-leaved). 



Sparganium simplex Huds., var. angustifolium Engelm. 



Rare. Floating in deep water: Canaan (J. W. Robbins, 

 1828). July — Aug. 



Sparganium fluctuans (Morong) Robinson (undulating). 

 Sparganium androcladum Morong, var. fluctuans Morong, at 



least in part. 

 Sparganium simplex Huds., var. Huitans Engelm. 



Rare. Deep water of cold ponds : Norfolk (J. W. Rob- 

 bins ) . July — Aug. 



Sparganium minimum Fries (least; smallest). 



Rare. Shallow water and mud of Twin Lakes, Salisbury 

 (Mrs. C. S. Phelps, A. V. Osmun & Bissell). July — Aug. 



NAJADACEAE. PONDWEED FAMILY. 

 POTAMOGETON L. Pondweed. 

 Potamogeton natans L. (floating). 



In ponds and slow streams. Rare or local over most of 

 the state: Southington (Andrews & Bissell), Oxford (Har- 

 ger), Salisbury (Mrs. C. S. Phelps, A. V. Osmun & Bissell). 

 Frequent in New London County (Graves). July — Aug. 



