108 FLORA OF MICHIGAN. 



233. PRE1STANTHES, Vaill. RATTLESNAKE-ROOT. 

 *679. P. 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., Beardstee ; Keweenaw Co., Farwell. Rare. 



*680. P. alba, L. White Lettuce. Rattlesnake-root. Th. 



Woods. Common. 



*681. P. altissima, L. Th. 



Rich woods. Frequent. 



234. TARAXACUM, Haller. DANDELION. 

 *682. T. OFFICINALE, Weber. Common Dandelion. 

 Fields everywhere. 



235. LACTUCA, Tourn. LETTUCE. 



*683. L. SCARIOLA, L. Prickly Lettuce. 

 A bad weed, spreading and becoming rapidly introduced everywhere along lines of railroad, etc. 



*684, L. Canadeiisis, L. Wild Lettuce. Th. 



Rich soil. Frequent. 



685. L. integrifolia, Bigel. 



Petoskey, Wheeler, 1890. 



* 686. L. hirsuta, Muhl. 

 Infrequent. Hubbardston; Macomb Co., Cooley. 



687. L. pulchella, DC. N. & U. P. 



" Upper Michigan," Prof. Porter; Caribou I.; Lake Huron, Dr. Todd; Keweenaw Co., F. 



*688. L. leucoplisea, Gray. Th. 



Frequent. 



689. var. integrifolia, Gray. 



BeUe Isle, Detroit, Wheeler. 



236. SONCHUS, L. SOW-THISTLE. 



*690. S. OLERACEUS, L. Common Sow-Thistle. 

 Waste places. Macomb Co. ; Montcalm Co. ; northward to L. Superior. Frequent. 



*691. S. ASPER, Vill. Spiny-leaved Sow-Thistle. Th. 



Waste places. Frequent. 



* 692. S. ARVENSIS, L. Field Sow-Thistle. 

 Grand Rapids Coleman's Cat. Bare. 



XLIX. LOBELIACE^E. LOBELIA FAMILY. 



237. LOBELIA, L. 



*693. L. carcliiialis, L. Cardinal-flower. Th. 



Kiver banks. Flowers rarely rose-color or even white. Showy and easily cultivated. Common. 



* 694. L. sypliilitica, L. Great Lobelia. L. P. 

 Low grounds. Flowers vary to white. Common. 



*695. L. spicata, Lam. Th. 



Oak openings. Frequent. 



[L. FLOBIDANA, Gaertn. 



Islands in Detroit river, Maclagan, Cat. Canadian Plants. Probably occurs within the State.] 



