1042 Excluded Species 



191. Rumex elongatus Guss. This species was reported by Andrews 

 for Monroe County. Since Andrews did not preserve a specimen it is 

 impossible to correctly refer this report. Doubtless an error. 



192. Rumex hastatulus Baldwin. This dock was reported from 

 Monroe County by Andrews. He preserved no specimen and since the 

 range of the species is along the Atlantic coast from Mass. to Fla. and Tex., 

 and up the Mississippi Basin to 111., I exclude it. 



193. Rumex occidentals S. Wats. Reported from Clark and Jefferson 

 Counties under the name of Rumex longifolius DC. Since Indiana is not 

 within the range of the species, these reports are referred to other species. 



Lab. to Alaska, southw. to Maine and Ont., and in the Rocky Mountains 

 to Tex. and Calif. 



194. Rumex persicarioides L. Coulter reported this species from 

 Marion County without any data. Since Indiana does not have the habitat 

 of the species, the specimen must be regarded as a waif. 



Seashore, Que. to S. C. ; and in brackish and saline places ; Ont. to 111. 

 and westw. 



195. Rumex sanguineus L. Reported from the Lower Wabash Valley 

 by Schneck and from Hamilton and Marion Counties by Wilson, who says, 

 "Common." Both of these reports no doubt shoulS be referred to the 

 red-veined form of Rumex obtusifolius. 



Native of Eu. and sparingly found in the U. S. It has been reported from 

 Mass., N. Y., and from Va. to La. 



196. Rheum Rhaponticum L. Garden Rhubarb. Reported by Peat- 

 tie as escaped in the Calumet District. Buhl (Amer. Midland Nat. 16: 251. 

 1935) says it is "only a nonpersistent garden escape". After cultivation, 

 rhubarb will persist for years in a suitable habitat. Since this is our only 

 report and authors rarely report it as an escape, it is best to exclude it 

 until there is additional evidence that it escapes freely enough to be con- 

 sidered a part of our flora. 



Nat. of Eu. 



197. Polygonum arifolium L. According to Fernald & Griscom (Rho- 

 dora 37: 167. 1935) the typical form is restricted to the southeastern part 

 of the United States south of the District of Columbia. Hence our plants 

 should all be referred to the var. lentiforme Fern. & Grisc. 



198. Polygonum atlanticum (Rob.) Bickn. This species was reported 

 from White County by Heimlich. I am referring this report to Polygonum 

 exsertum. 



199. Polygonum aviculare var. arenastrum (Bor.) Rouy. Reported by 

 Peattie from "sandy roadsides, Pine and perhaps elsewhere" in Lake 

 County. Since I have seen no specimen, I am excluding the variety. 



200. Polygonum Hydropiper L. (Persicaria Hydropiper (L.) Opiz of 

 Britton and Brown, Illus. Flora, ed. 2.) (Stanford. Polygonum Hydropiper 



