Proserpinaca 



Haloragidaceae 



711 



~W 



Map 1502 



Myriophyllum scabratum Michx 







Map 1503 

 Mynophyllum verticillatum 



var pectmatum Wallr. 



50 



Map 1504 

 rpmaca palustris 

 var. amblyogona Fern. 



and is doubtless infrequent to frequent in most of our lakes although I have 

 botanized several lakes without finding it. In addition to the counties in 

 which I have found it, it has been reported from Lake County. I have found 

 it only in lakes. 



Lab. to Alaska, southw. to Conn., N. Y., Ind., Kans., N. Mex., Ariz., 

 and Calif. 



2. Myriophyllum heterophyllum Michx. Map 1501. This species is 

 infrequent or locally frequent in the lake area. It is found in lakes and 

 more frequently in dredged ditches. 



N. J. to Fla., near the coast; also from cent. N. Y., Ont. to Minn., southw. 

 to Mo. and Tex. 



3. Myriophyllum scabratum Michx. (Myriophyllum pinnatum of Brit- 

 ton and Brown, Illus. Flora, ed. 2.) Map 1502. Our only recent report for 

 this species is from Jasper County where I found it in the old channel of 

 the Kankakee River half a mile west of the Tefft Bridge. It is doubtless 

 very rare in Indiana. 



Coastal Plain from Mass. to Fla. and Tex., and northw. to Ind. and 

 Iowa. 



4. Myriophyllum verticillatum L. var. pectinatum Wallr. Map 1503. 

 Our only specimens are from Crooked Lake, Steuben County, but doubtless 

 it is more widely distributed. The reports, made by earlier authors, of 

 Myriophyllum pectinatum from Fulton, Kosciusko, Marshall, Steuben, 

 and Vigo Counties and from the dune area should probably be referred to 

 this variety. 



Newf. to Ont. and Wash., southw. to Md., 111., and Utah. 



5835. PROSERPINACA L. 



[Fernald & Griscom. Proserpinaca palustris and its varieties. Rhodora 

 37: 177-178. 1935.] 



Angles of fruit rounded 1. P. palustris var. amblyogona. 



Angles of fruit sharp la. P. palustris var. crebra. 



