120 CATALOG OF PLANTS. 



872. Sonchus oleraceus L. Common sow thistle. — Noticed as a weed 



in fields, gardens, and waste places. 

 873i Sonchus asper (L.) Hill. Spiny-leaved sow thistle. — Frequent 



as a weed in cultivated grounds. 



874. Lactuca scariola L. Prickly lettuce. — Along the railroad be- 



tween Bayport and Sebewaing. Rare. 



875. Lactuca scariola integrata Gren. & Godr. Prickly lettuce. — 



Frequent about country dwellings, along railroads, and in 

 villages. The prevailing form. 



876. Lactuca canadensis L. Wild lettuce. — Borders of woods, thick- 



ets, and on damp ground. Frequent; --^ 



877. Lactuca hirsuta Muhl. Hairy wood lettuce. — On dry open 



ground on Sand Point, Stony Island and near Rush Lake. 



878. Lactuca spicata (Lam.) Hitchc. Tall blue lettuce. — Frequent 



on damp ground and in damp open woods. 



879. Prenanthes racemosa Michx. Glaucous white lettuce. — In wet 



marshy places at Sand Point and near Rush Lake. 



880. Prenanthes alba L. White lettuce. — In rich open woods at Sand 



Point. 



881. Prenanthes altissima L. Tall white lettuce. ^ — In rich open 



woods at Sand Point, Bayport and Sebewaing. 



882. Hieracium venosum L. Rattlesnake-weed. — Frequent on poor 



sandy ground; occasional on shaded sand dunes. 



883. Hieracium scabrum Michx. Rough hawkweed. — Occasional in 



sandy ground at Sand Point. 



884. Hieracium gronovii L. Gronovius' hawkweed. — On sandy 



ground on Charity Island. 



885. Hieracium canadense Michx. Canada hawkweed. — On poor 



sandy ground near Bayport and Sebewaing. 



886. Hieracium umbellatum L. Narrow-leaved hawkweed. — Fre- 



quent on sandy shaded ground throughout the sand region. 



