200 SIXTEENTH REPORT. 



Hieracium venosum L. Rattlesnake-weed. — Common in dry open ground, 

 dry open woods and thickets. 



Hieracium scabrum Michx. Rough Hawkweed. — Frequent in dry woods, 

 thickets and ]oastures. 



Hieracium gronovii L. Gronovius' Hawkweed. — Frequent on dry sandy 

 ground in open woods and thickets. 



Hieracium longipilum Torr. Long-bearded Hawkweed — Occasional along 

 Lake Huron shore. Prof. John Alacoun. Abundant on Squirrel Lsland, 

 one of the delta islands of St. Clair River. 



Hieracium canadense Michx. Canada Hawkweed. — Frequent on poor 

 and sandy ground in open woods and thickets. 



