1104 Excluded Species 



ported it from the Lower Wabash Valley for Schneck. This report was 

 taken from Dr. Schneck's notes and a specimen was not seen, hence this 

 report should be dropped. 



Coastal Plain from Maine to Fla., and along the Gulf to Tex. 



689. Cirsium undulatum (Nutt.) Spreng. This species was reported 

 from Lake County by Hill and by Higley & Raddin before Cirsium Hillii 

 was known to these authors. The reports should be transferred to Cirsium 



Hillii. 



Lake Huron to Assina. and Alberta, southw. to Kans., N. Mex., and Ariz. 



690. Silybum marianum (L.) Gaertn. (MariciTia mariana (L.) Hill 

 of Britton and Brown, Illus. Flora, ed. 2.) Milk THISTLE. In 1905 I 

 found a single plant of this species in a truck garden on a farm 2 miles 

 east of Bluffton, Wells County. It has been reported also from Jasper 

 County by Welch, who says it was introduced in radish seed. Since this 

 species is regarded as an occasional escape, it seems best so to regard our 

 two reports. 



Nat. of s. Eu. ; an occasional escape from Ont. to Ala. and on the Pacific 

 coast where it is naturalized in Calif. 



691. Centaurea Cyanus L. Cornflower. We have this species re- 

 ported from seven counties as a garden escape or without data. In 1937 I 

 found it to be frequent in the railroad yards in east Goshen, Elkhart 

 County. 



Nat. of Eu. and the Orient. ; Que. to Nebr., southw. to Va., and Calif. 



692. Centaurea Jacea L. Brown Knapweed. Reported as a garden 

 escape in the Calumet District of Lake County. There is no definite infor- 

 mation concerning it. In 1921 I collected a specimen in a pasture just east 

 of Bluffton and in 1935, and after the area had been severely grazed for 

 14 years, I found it still plentiful. 



Nat. of Eu. and Siberia ; naturalized in various parts of N. A. 



693. Centaurea maculosa Lam. Spotted Knapweed. Hansen (Proc. 

 Indiana Acad. Sci. 36: 251. 1927) reported this species as a weed near At- 

 lanta, Hamilton County. There is no information concerning how long it 

 has been known in this area. It is a species we can expect to become estab- 

 lished soon if it has not already done so. 



Nat. of Eu. ; Mass., Vt., Mich., Wis. to Minn., southw. to N. J. and Pa. 



694. Centaurea moschAta L. Sweet-sultan. This species was re- 

 ported as occurring about Mineral Springs but the report lacked specific 

 data. 



Nat. of Asia ; not yet reported in our manuals of botany. 



695. Centaurea solstitialis L. Yellow Star Thistle. Reported 

 as found in alfalfa fields in Dearborn County (Proc. Indiana Acad. 

 Sci. 1905: 175. 1906) and Gibson County (Proc. Indiana Acad. Sci. 33: 215. 

 1924) . No data are given as to how long it was found in the locality. 



Nat. of Eu. and Algeria ; Mass., Ont., Iowa, to Calif. ; southw. to Fla. 



