Excluded Species 1103 



southwest of Plymouth, Marshall County. I visited this colony a few 

 years later, and it was spreading but still on the right of way. It is well 

 established here and will persist unless it is destroyed. I exclude it until 

 there are more records of its occurrence. 

 Minn., Utah, southw. to Tex. and Ariz. 



682. Senecio aureus var. semicordatus (Mack. & Bush) Greenman. 

 This variety was reported by Buhl (Bull. Chicago Acad. Science 5: 9. 1934) 

 from Lake County, Indiana, upon the authority of Greenman. Buhl was in 

 error, since Greenman cited a Lake County, Illinois, specimen (Ann. 

 Missouri Bot. Gard. 3: 130. 1916). 



683. Senecio obovatus var. umbratilis Greenman. The type specimen 

 of this variety was collected by Clapp in the vicinity of New Albany and 

 is deposited in the Gray Herbarium. Fernald (Rhodora 23: 29. 1921) 

 refers this variety to Senecio pauperculus var. Balsa mitae (Muhl.) Fern. 



684. Senecio palustris (L.) Hook. This species was reported from 

 Clay County by Coulter (Proc. Indiana Acad. Sci. 1896 : 166. 1897). As now 

 understood, it is northern in its distribution and reaches the United States 

 only in the northwest. 



Lab. to Alaska, southw. to n. Wis., N. Dak., and Iowa. 



685. Echinops sphaerocephalus L. Common Globethistle. This 

 plant was reported by McDonald as being found at Chain Lakes, St. Joseph 

 County. Since this is our first report, and no data are given concerning 

 its establishment, I am regarding it as a casual garden escape. Like many 

 other garden plants, however, it may escape and become a permanent part 

 of our flora. Paul C. Standley informs me that it is well established in 

 Kankakee County, Illinois. 



Nat. of Eu. ; our manuals give no data concerning its distribution in 

 the U. S. 



686. Arctium Lappa L. Great Burdock. This species has been re- 

 ported from many counties, but I believe all reports should be referred to 

 Arctium minus. In the absence of confirming specimens, it is excluded 

 from our flora. 



Nat. of Eu.; N. E. and east central states, possibly farther westward. 



687. CiRSiUM pumilum (Nutt.) Spreng. (Cirsium odoratum (Muhl.) 

 Britt. of Britton and Brown, Illus. Flora, ed. 2.) This thistle has been re- 

 ported from the dune area, but I refer these reports to Cirsium Hillii. 

 Collins reported it from Dearborn County and Coulter reported it from 

 Marion County on the authority of Wilson. Both of these reports should 

 go to some other species. This is regarded as a trans-Alleghenian species. 



N. E. to Pa., Del., and N. C. 



688. Cirsium spinosIssimum (Walt.) Scop. (Cirsium horridulum 

 Michx. of Britton and Brown, Illus. Flora, ed. 2.) Yellow Thistle. Re- 

 ported from Putnam County on the authority of MacDougal by Coulter, 

 who later said the specimen should be referred to Cirsium vulgare. I re- 



