BEAL ON MICHIGAN FLORA. 127 



*1994. L. spicata (Lam.) Hitchc. Tall Blue Lettuce. L. leitcophaea A. Gray. Fre- 

 quent. Th. 



1995. L. spicata integrifolia (T. &, G.) Britton. L. Icuoophaea integrifolia T. & G. 

 Belle Isle, Detroit, C. F. Wheeler. 



*1995a. L. virosa L. Prickly Lettuce. Usually given the name L. Scariola L., which 

 has pinnatifid leaves. Common. 



CREPIS L. 



*1996. C. tectorum L. Narrow-leaved Hawksbeard. Introduced. 



HIERACIUM L. 



*1997. H. Canadense Michx. Canada Hawkweed. Woods. Frequent. Th. 

 *1998. H. Gronovii L. Hairy Hawkweed. Dry soil. Ionia Co.; Flint; Macomb Co.; 

 S. W. Mich., Wright Cat.; Alma. Infrequent. C. & S. 



1999. H. longipilum Torr. Long-bearded Hawkweed. Fields. Macomb Co.; Trav- 

 erse City, S. W., Wright Cat.; Grand Rapids, Coleman; Algonac, W. S. Cooper; Tuscola 

 Co., C. A. Davis. Scarce. L. P. 



2000. H. Marianum Willd. Maryland Hawkweed. Shore of Grand Traverse Bay, 

 C. F. Wheeler. 



*2001. H. paniculatum L. Panicled Hawkweed. Macomb Co.; S. Mich., Wright 

 Cat. Scarce. C. & S. 



2002. H. Pilosella L. Mouse-ear Hawkweed. Introduced at Benzonia, G. A. Clark. 



*2003. H. scabrum Michx. Rough Hawkweed. Woods; Alma. Common. Th. 



*2004. H. umbellatum L. Narrow-leaved Hawkweed. Marquette, C. F. Wheeler. 



*2005. H. venosum L. Rattlesnake-weed. Dry soil in pine woods, or on oak land. 

 Abundant at Point aux Pins, at the entrance to Lake Superior, Macoun, Can. Cat.; 

 Port Austin, Ann Arbor, C. A. Davis. Frequent. 



NABALUS Cass. PRENANTHES Vaill. 



*2006. N. albus (L.) Hook. Rattlesnake-root. Prenanthcs alba L. Woods. Com- 

 mon. Th. 



*2007. N. altissimus (L.) Hook. Tall White Lettuce. Prcnantlies altissima L. Rich 

 woods. Frequent. Th. 



*2008. N. racemosus (Michx.) DC. Glaucous White-Lettuce. Prcnantlies racemosa 

 Michx: Lenawee Co., G. F. Comstock; Flint; Macomb Co.; shore of L. Mich., near 

 Sitting Rabbit, Winch. Cat.; S. W., Wright Cat.; Cheboygan Co., Beardslee, Keweenaw 

 Co., Farwell; Kawkawlin, Ann Arbor, Grass Lake, Bay" Port, C. A. Davis. Rare. Th. 



2009. N. trifoliatus Cass. Tall Rattlesnake-root. Washington, Dr. D. Cooley. 



AMBROSIACE^E Reichenb. Ragweed Family. 

 IVA L. 



2010. I. xanthiifolia (Fresen.) Nutt. Marsh Elder. High water-shrub. Keweenaw 

 Co., O. A. Farwell. The farthest station east known. 



AMBROSIA L. 



*2011. A. artemisiaefolia L. Roman Wormwood. Ragweed. Hog- weed. Bitter- 

 weed. Roadsides. Introduced from the west. Abundant. Th. 



2012. A. psilostachya DC. Manistee, F. P. Daniels; shore of Lake Huron, C. K. 

 Dodge; Keweenaw Co., 0. A. Farwell. 



*2013. A. trifida L. Great Ragweed. Common. Low grounds along Grand and 

 Maple Rivers; northward to Keweenaw Co., 0. A. Farwell. 



2014. A. trifida integrifolia T. & G. Low land. Keweenaw Co., 0. A. Farwell. Th. 



XANTHIUM L. 



*2015. X. Canadense Mill. Common in waste places and along river banks. 

 2015a. X. commune Britton. Britton and Brown's Flora. 



2016. X. echinatum Murr. X. Canadense ecliinatum A. Gray. Shores of Great 

 Lakes. 



