1024 Excluded Species 



occurs far north of our area, and doubtless our reports should be referred 

 to segregates of this species. 



31. Potamogeton pusillus L. There are old reports of this species from 

 the Lower Wabash Valley and from Lake, Kosciusko, Marshall, and Starke 

 Counties. The species, as now understood, is divided into several varieties, 

 one of which is reported from Indiana. This species so closely resembles 

 some others that reports can not be accepted without verifying specimens. 



32. Potamogeton Vaseyi Robbins. Reported from the Lower Wabash 

 Valley and from Porter County. This species, as now understood, occurs 

 north of our area, but comes so close to us that it should be sought in 

 Indiana. Since there is no verifying specimen, the reports are dropped. 



N. B. to e. Minn., southw. to Maine, Conn., Pa., n. Ohio, s. Mich., and 

 n. 111. 



33. Sagittaria Engelmanniana J. G. Smith. This species has been 

 reported from 8 counties. These reports should be referred, doubtless, to a 

 narrow-leaf form of Sagittaria latifolia. Since Indiana is outside the range 

 of the species, and there are no confirming specimens, the species is ex- 

 cluded. It is said to grow in shallow water, and its distribution as now 

 understood is restricted to the Coastal Plain from Massachusetts to Vir- 

 ginia. 



34. Sagittaria longirostra (M. Micheli) J. G. Smith. I reported this 

 species (Proc. Indiana Acad. Sci. 1916: 316. 1917) as found in Vigo County. 

 Since I am not now able to locate the specimen, I cannot tell to what species 

 it should be referred. At the Gray Herbarium this species of Small's 

 "Flora of the Southeastern United States" is referred to Sagittaria awstra- 

 lis, and the true Sagittaria longirostra of J. G. Smith is considered a broad- 

 leaf Sagittaria Engelmanniana. Hence this name is dropped from our flora. 



35. Sagittaria pubescens Muhl. Reported from Hamilton and Marion 

 Counties by Wilson who says: "Common." I am not able to account for 

 such a report since the range of this species is said to be south of Indiana. 

 Since there is no verifying specimen, it is excluded. 



N. J., Pa., Tenn., southw. to Fla. and Ala. 



36. Elodea Nuttallii (Planch.) St. John. This species was reported by 

 Peattie from Lake County. It is now regarded as a synonym of Anacharis 

 occidentalis (Pursh) Vict, to which I am referring this report. 



37. Elodea Planchonii Caspary. I reported this species from Knox 

 County. It is now regarded as the pistillate form of Anacharis canadensis 

 (Michx.) Planch, to which I now refer it. 



38. Limnobium Spongia (Bosc) L. C. Richard. Reported from Lake 

 County by T. H. Ball in his "History of Lake County" (1884, p. 170). This 

 species is within our area, but since no specimens were preserved, it is 

 necessary to exclude it. 



Lake Ontario to 111., southw. to Fla. and Tex. 



