82 



POTAMOGETONACEAE 



Potamogeton 



50 



Map 92 

 Potamogeton foliosus Raf. 



var. genulnus 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



Auj 



Sept. 



Oct. 



Nov. 



Dec. 



Miles 



o 50 



Map 92a 

 Potamogeton foliosus 

 var. macellus Fern. 



^5 

 Map 93 



Potamogeton pusillus 

 var. mucronatus (Fi'eber) Graebn. 



the map. The habitat is that of the species, although I have more speci- 

 mens from lakes. 



Cape Breton Island, N. S., Que. to Mack., southw. to Fla., Mo., Kans., 

 Nev., and Calif. ; also in Hawaii. 



18. Potamogeton pusillus L. var. mucronatus (Fieber) Graebn. Map 93. 

 Our only report is that of Fernald. The specimen was collected by E. B. 

 Williamson in Crooked Lake, Steuben County, June 17, 1900, and is de- 

 posited in the herbarium of the Missouri Botanical Garden. 



Sw. Greenland, Newf. to Alaska, southw. to N. S., s. N. E., L. I., Del., 

 s. Minn., Mont., and Vancouver Island ; Eurasia. 



19. Potamogeton strictifolius Bennett var. typicus Fern. (Mem. Gray 

 Herb. 3: 56-57. 1932.) Map 94. There are specimens from only a few of 

 our northwestern lakes. 



Vt. to Sask., southw. to Mass., cent. N. Y., s. Ont., n. Ohio, n. Ind., n. 

 Wis., s. Minn., n. Nebr., and Utah. 



19a. Potamogeton strictifolius var. rutiloides Fern. (Mem. Gray Herb. 

 3: 57-60. 1932.) Our only Indiana specimen was collected by Scovell 

 & Clark in Lake Maxinkuckee, Marshall County, and is deposited in the 

 herbarium of the Field Museum. 



Sw. Que. to Mack., southw. to Vt., nw. N. Y., s. Mich., nw. Ind., s. 

 Minn., n. Nebr., and Utah. 



20. Potamogeton panormitanus Biv. var. major G. Fischer. Map 95. 

 My only specimens are from a dredged ditch in Jasper County and from a 

 small lake in De Kalb County. 



Magdalen Islands and Gaspe Co., Que. to n. Alberta and s. B. C, 

 southw. to Va., Ark. to s. Calif., and south-central Mex. ; Cuba, Azores, 

 and Eurasia. 



