Excluded Species 1105 



696. Centaurea vochinensis Bernh. Tyrol Knapweed. This species 

 was found by Kriebel in Lawrence County in 1936. It was common for a 

 distance of about a hundred yards along U. S. Highway 50, and an adjacent 

 worn out field about 4 miles southwest of Bedford. Also reported from 

 Notre Dame, St. Joseph County. 



Nat. of Eu.; Mass. to Ont. and s. N. Y. 



697. Hypochaeris radicata L. Reported from St. Joseph County by 

 McDonald as found at Notre Dame, where Nieuwland says that it is well 

 established. In 1897 I found a specimen in a yard in Bluffton, but I have 

 not seen a specimen since that time. Blatchley reported it from Monroe 

 County where he found it on the campus of Indiana University in 1887. 



Nat. of Eu. ; Newf. to Ohio, southw. to N. J. and Pa., also in Colo, and 

 on the Pacific coast. 



698. Apargia autumnale (L.) Hoffm. (Leontodon autumnale L. of 

 Gray, Man., ed. 7.) Coulter reported this species for me from Wells County, 

 but a reexamination of the specimen shows it to be Hypochaeris radicata L. 



Nat. of Eu. ; Newf. to Mich., southw. to Pa. and Ohio. 



699. Sonchus uliginosus Bieb. I reported this species from Noble 

 County (Proc. Indiana Acad. Sci. 1922: 264. 1923). I am now referring 

 the specimen to Sonchus arvensis var. glabrescens Guenth., Grab. & Wimm. 

 (Rhodora 30: 19. 1928.) 



700. Lactuca hirsuta Muhl. This species has not been correctly 

 treated in our manuals. It has been confused with Lactuca canadensis from 

 which it has been separated principally on the pubescence of stem and 

 leaves. Fernald and Wiegand made a study of the two species (Rhodora 

 12: 145-146. 1910) and found the length of the involucre, achenes, and 

 pappus were the true characters to separate them. Too, the range of this 

 species does not include Indiana. 



Que. to Ala. and Tex., chiefly east of the Allegheny Mts., especially 

 along the Coastal Plain. 



701. Lactuca sativa L. Hansen (Proc. Indiana Acad. Sci. 36: 251. 

 1927) writes: "Near Anderson there is an infestation of a plant that 

 appears to be a wild form of the common garden lettuce, Lactuca sativa 

 L. On one farm where the plant infests about five acres of land and is very 

 thick in places, the farmer considers it a bad weed." There is no other 

 record of our garden lettuce becoming a weed and I believe this report 

 should be referred to some other species. 



702. Lactuca virosa L. This species has been reported several times, 

 and I believe authors who reported it have followed Britton and Brown's 

 Illus. Flora, ed. 2, whose Lactuca virosa is our Lactuca Scariola. As I un- 

 derstand this species it has black, shining achenes and has not been found 

 in Indiana but has been found in several places in the United States. See 

 Dewey's discussion of this species and Lactuca Scariola and its variety in 

 Rhodora 7: 12. 1905. 



