1052 Excluded Species 



260. Brassica Napus L. Rape. This species has been reported from 

 two counties. I have found it a few times. It has been rather extensively 

 sown for green feed for hogs and if such fields are permitted to remain 

 fallow the year following the sowing, sometimes in sandy places many 

 plants may appear, but there is no evidence that it has become established 

 anywhere. Found also along roadsides. 



Nat. of Eu. 



261. Brassica Rapa L. Turnip. There are reports of this species from 

 two counties. I have found it several times in fields where turnips had 

 been grown the previous year but there is no record of its being estab- 

 lished. 



Nat. of Eu. 



262. Raphanus sativus L. Garden Radish. This is an annual and 

 may persist for a year or two but there is no evidence that it has become 

 established anywhere. In 1916 I found it to be plentiful in an oatfield 1 

 mile south of Alexandria in Madison County. 



Nat. of Asia. 



263. Rorippa obtusa (Nutt.) Britt. (Radicida obtusa (Nutt.) Greene 

 of Gray, Man., ed. 7 and Britton and Brown, Illus. Flora, ed. 2.) This 

 species has been reported from Clark, Jefferson, and Tippecanoe Coun- 

 ties. These reports are all more than 50 years old and since our manuals 

 of that period did not very distinctly separate this species, I believe all 

 of these reports should be referred to some other species. There is no 

 Indiana specimen. 



Mich, to Mont., southw. to Tex. and Calif. 



264. Rorippa sinuata (Nutt.) Hitchc. (Radicula sinuata (Nutt.) Greene 

 of Gray, Man., ed. 7 and Britton and Brown, Illus. Flora, ed. 2.) This 

 species was reported by Wilson (Proc. Indiana Acad. Sci. 1905; 170. 1906) 

 who says a colony had persisted for fifteen years along the Big Four Rail- 

 road west of Greencastle. Doubtless this report should be referred to 

 Rorippa sylvestris. In the absence of a verifying specimen I am omitting 

 this species from our flora. 



111. and Minn, to Wash., southw. to Tex. and Ariz. 



265. Cardamine hirsuta L. Reported by 20 authors and all of the 

 reports except one are 40 or 50 years old and were made when our manuals 

 did not recognize Cardamine pennsylvanica to which I refer all of these 

 reports. As now understood, this name is restricted to an introduced plant 

 which is of rare occurrence. 



Nat. of Eurasia. 



266. Cardamine flexuosa With. Now regarded as a semi-aquatic form 

 of Cardamine pennsylvanica Muhl. to which I am referring it. It was re- 

 ported by Smith from Marion County (Proc. Indiana Acad. Sci. 1905: 157. 

 1906). 



