122 FLORA OF MOUNT DESERT. 



H. scabrum, MX. ROUGH HAWKWEED. 

 Woods and roadsides; common. 



PRENANTHES, L. (Nabalus, Cass.) RATTLESNAKE-ROOT. 

 P. serpentaria, Pursh. Nabalus Fraseri, DC. 



Dry soil; common. 

 Var. nana (DC.), Gray. Nabalus nanus, DC. 



Common on mountain summits and rocky places. Green Mt. 

 (Wm. C. Lane) ; Sargent Mt. ; Pemetic Mt. ; Jordan Mt. ; 

 Beech Cliff; Button Island, etc. (Rand). 



P. altissima, L. WOOD RATTLESNAKE-ROOT. 



Rich damp woods ; frequent. A form with dark purple his- 

 pidulous stems, Southwest Valley road (Rand) . 



TARAXACUM, Haller. DANDELION. 

 T. OFFICINALE, Web. T. Dens-leonis, Desf. DANDELION. 



Becoming common; roadsides and waste places, sometimes 

 even ID woods. Naturalized from Europe. 



LACTUCA, L. LETTUCE. 

 L. SATIVA, L. GARDEN LETTUCE. 



Persistent for years in waste ground, Fernald Point (Rand). 

 Escaped from cultivation. 



L. Canadensis, L. WILD LETTUCE. 



Roadside and clearings ; frequent. 

 L. integrifolia, Bigel. 



Dry soil; infrequent. Northeast Harbor (John L. Wake- 

 field, Rand); Somesville; Frenchman Camp (Redfield). 



L. leucophasa (Willd.), Gray. BLUE LETTUCE. 



Low grounds, roadsides, and waste places ; common. 



