32 the American midland naturalise 



Leeds; Kulm, Brenckle). 



972. Sonchus agrestis Mar. Yirg. 1. c. (1529). 



Sonchus repens J. Bauhin, Hist. Plant Vol. II. Bk. 24, p. 

 1017. (1651). 



Sonchus arvensis Linn. Sp. PI. 793. (1753). 



Butte, Narrows. 



LACTUCA Plin. Hist, page 356: 41. Tourn, I. R. II. 267. 

 (1700). Linn. Gen. 240. (1737). 



Lactucula Veyr. "Teneris frondens lactucula fibris." Yirg. 

 '"Moretum" 76. 



973. Lactuca sylvestris Fuehs. Stirp. 172. (1549); Matth. 

 Comm. 2: 130. (1559J; Matth. De Plant. 298. (1586); Clus. Hist. 

 Stirp. 343. (1583); Linn. Sp. PI. (1753)- 



Lactuca Scariola Linn. Sp. PI. ed. 2 : 1 1 1 9. ( 1 763 ) . 

 Kulm (Brenckle.) 



974. Lactuca integrata (Gren. & Godr. I A. Xels. in Fl. of 

 Rocky Mts., 596. (1909J. 



Lactuca Scariola integrata Gren. & Godr. Fl. Franc. 2: 320. 

 (1850). 



Leeds, Minot, Devils Lake. 



975. Lactuca pulchella (Pursh) DC. Prodr. 7: 134. (1838). 

 Sonchus pukhellus Pursh, Fl. Am. Sept. 502. (1814). 

 Leeds, Butte. 



976. Lactuca campestris Greene, Pittonia IV: 37. (1899). 

 Leeds, Butte. 



977. Lactuca ludoviciana (Nutt.) DC. Prodr. 7: 141. (1838 

 Sonchus ludovicianus Nutt. PI. 2: 25. (1818). 



'"Fort Mandan on the Missouri, open plains." 



978. Lactuca canadensis I. inn. Sp. PI. 796. (1753). 

 Turtle Mountains. 



979. Lactuca sativa Mar. Yirg. de Diosc. II: 125. (1529): 

 " Romani sativa lactuca nominant." Dod. I list . PI. 394. (1551); 

 Ang. Simplici 123. (1561); Bauhin, Pin. 122. (1620); Linn. Sp. 

 PI. ed. 2: 1 1 18. (1763). 



Leeds. 



980. Lactuca spicata (Lam.) Hitchc. Trans. Acad. St. Louis 

 5: 506. (1891). 



Sonchus spicalits Lam. Kncvcl. .; : pi. (1789). 



I, iids, Peninsula <>!' Lake Ibsen, I >unsieth, St. John. 



