TUSCOLA COUNTY 001 



Arctium minus Bernh. Common burdock. Common as a weed about 

 dwellings and in cultivated grounds. Also occasional in open woods 

 and along streams. 



Cirsium lanceolatum (L.) Hill. Common thistle. Bull thistle. Fre- 

 quent on roadsides and in pastures. 



Cirsium discolor (Muhl.) Spreng. Field thistle. "Cass River valley 

 in sandy and gravelly soil." C. A. Davis. 



Cirsium muticum Michx. Swamp thistle. Frequent throughout in 

 low swampy places. 



Cirsium arvense (L.) Scop. Canada thistle. Frequenl throughout. 

 Apparently not as vicious a weed here as in Sanilac and Huron count* 



Cichorium intybus L. Common chicory. Occasional on roadaick - 

 and in villages. 



Krigia virginica (L.) Willd. Carolina dwarf dandelion. "Low sand 

 ridges in the prairies of Akron Township." C. A. Davis. 



Krigia amplexicaulis Nutt. Cynthia. Virginia goat's beard. -Sandy 

 soil in prairies of Akron Township. " C. A. Davis. 



Tragopogon porrifolius L. Salsify. Oyster-plant. Frequent in vil- 

 lages, along roads and railroads. 



Tragopogon pratensis L. Goat's beard. Noticed as a weed about 

 Mayville. Often plentiful along railroads and in waste places of cities 

 and villages. 



Taraxacum officinale Weber. Common dandelion. Common every- 

 where in cultivated ground, lawns and pastures. 



Sonchus arvensis L. Field sow thistle. Occasional about railway sta- 

 tions, depot grounds, and along railroads. 



Sonchus oleraceus L. Common, sow thistle. As a weed along roads, 

 in villages, gardens and fields. 



Sonchus asper (L.) Hill. Spiny-leaved sow thistle. As a weed in 

 villages, gardens, cultivated fields and about dwelling 



Lactuca scariola integrata Gren. & Godr. Prickly lettuce. ( Common 

 along roads and in waste places. 



Lactuca canadensis L. Wild lettuce. Frequent in rich damp ground, 

 especially on borders of and in open woods and thickets. 



Lactuca hirsuta^Sluhl. Hairy wood lettuce. "Sandy soil near Car 

 C. A. Davis. 



Lactuca spicata (Lam.) Hitchc. Tall blue lettuce. Frequent in low 

 ground and rich open woods. 



Prenanthes alba L. White lettuce. Rattlesnake-root. Frequeni 

 throughout in rich woods and thickets. 



Prenanthes altissima L. Tall white lettuce. In damp ground near 

 Cat Lake. Probably frequent throughout. 



Hieracium venosum L. Rattlesnake-weed. 'Sandy woodlan 

 Indianfields and Vassar townships." ( !. A. Davis. 



