352 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



var. CEISPUM DC. — Occasional with the type. Williamstown; 

 Alford; New Marlboro. 



TARAXACUM. Dandelion. 

 (Leontodon 111. Fl. ed. 2.) 



T. LAEviGATUM (WiUd.) DC. Red-seeded Dandelion. — ( T. 

 erythrospermum Man. ed. 7; L. erythrospermum 111. Fl. ed. 2.) 



Fields and hillsides in thin soil; frequent. 



T. OFFICINALE Weber. Common Dandelion. — {L. Taraxacum.) 



Fields and roadsides; common. 



var. palustee (Sm.) Blytt. — Swamps; occasional. Stockbridge; 

 New Marlboro (Walters); Sheffield (Walters). 



TRAGOPOGON. Goat's Beabd. 

 T. PEATENSiSvL. — -Fields and roadsides; frequent. 



TUSSILAGO. Coltsfoot. 



T. Faefaea L. Coltsfoot. — Brooks, ditches and wet slopes ; 

 common. 



XANTHIUM. CocKLEBUK. 



X. echinatum Murr. — Clear dry sand, Sheffield (Walters). 

 X. pungens Wallr. — {X. canadense Man. ed. 7; X. pennsylvanicum 

 111. Fl. ed. 2.) 

 Alluvial ground; frequent in the valley. 

 X. SPiNOSUM L. — Dump at woolen mill, Pittsfield. 



