No. 14.] FLOWERING PLANTS AND FERNS. 4I3 



Crepis taraxacifolia Thuill. (having leaves like Taraxacum, 

 the Dandelion). 



Rare. Southington, in grassland (Bissell). May — June. 

 Fugitive from Europe. 



Crepis setosa Haller f. (bristly). 



Rare. Fairfield, in grassland, probably introduced with 

 grass seed (Fames). Sept. — Oct. Adventive from Europe. 



Crepis rigida W. & K. (stiff). 



Rare. Southington, in fields (Bissell). June — July. 

 Fugitive from Europe. 



PRENANTHES L. Rattlesnake-root. 

 Prenanthes alba L. (white). 

 Nabalus albus Hook. 

 White Lettuce. Rattlesnake-root. 



Rare, local or frequent. Open woods, copses and fence- 

 rows. Aug. — Oct. 



The plant and roots are medicinal. 



Prenanthes serpentaria Pursh (classical name). 

 Nabalus serpentarius Hook. 

 Lion's-foot. Gall-of-the-earth. 



Woods and thickets. Voluntown, Waterford and Wind- 

 ham (Graves), Groton and Oxford (Harger), Southington 

 (Bissell), and occasional toward the south and southwest. 

 Aug. — Oct. 



The root and leaves are medicinal. 



Prenanthes trifoliolata (Cass.) Fernald (with three leaflets). 

 Nabalus trifoliolatus Cass. 



Prenanthes serpentaria Gray's Manual ed. 6 in part, not Pursh. 

 Gall-of-the-earth. 



Frequent. Woods and thickets. Aug. — Oct. 



Extremely variable in leaf form. 



Prenanthes altissima L. (very tall). 

 Nabalus altissimus Hook. 

 Gall-of-the-earth. 



Occasional or frequent. Rich woods. Aug. — Oct. 



The var. hispidula Fernald (minutely hispid) occurs at 

 Staiiford (Graves & Bissell), and Oxford (Harger). 



