352 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
var. CRiSPUM DC. — ^Occasional with the type. Williamstown ; 
Alford; New Marlboro. 
TARAXACUM. Dandeliox. 
(Leohtoiloi, 111. Fl. cd. 2.) 
T. LAEViGATUM (Willcl.) DC. Red-seeded Dandelion. — ( T. 
erythrospcrmum Man. ed. 7; L. cruthrospermum 111. Fl. ed. 2.) 
Fields and hillsides in thin soil; frequent. 
T. OFFICINALE Weber. Common Dandelion. — (L. Taraxacum.) 
Fields and roadsides; common. 
var. palustre (Sm.) Blytt. — Swamps; occasional. Stockbridge; 
New Marlboro (Walters); Sheffield (Walters). 
TRAGOPOGON. Goat's Beard. 
T. pratensis L. — Fields and roadsides ; frequent. 
TUSSILAGO. Coltsfoot. 
T. Farfara L. Coltsfoot. — Brooks, ditches and wet slopes ; 
common. 
XANTHIUM. CocKLEBUR. 
X. echinatum Murr. — Clear dry sand, Sheffield (Walters). 
X. pungens Wallr. — (.Y. canadcnse Man. ed. 7; A", pcnnsylvanicum 
111. Fl. ed. 2.) 
Alluvial ground; frequent in the valley. 
X. spinosum L. — Dump at woolen mill, Pittsfield. 
