340 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 



B. frondosa L. Common Beggae-ticks. — Waste places, road- 

 sides and low ground; common. 



B. vulgata Greene. Beggar-ticks. — Along roadsides and in damp 

 soil; frequent. 



CENTAUREA. Star Thistle. 



C. Jacea L. — Occasionally adventive. Williamstown (Churchill) ; 

 Sandisfield (Walters). 



C. MACULOSA Lam. — Well established in dry fields in Sheffield. 

 Vacant lot, Pittsfield. 



C. NIGRA L., var. eadiata DC. Knapweed. — Waste ground, 

 Pittsfield; dry fields, Sandisfield and Sheffield (Walters). 



CHRYSANTHEMUM. Ox-eye Daisy. 



C. LEUCANTHEM0M L., var. piNNATiFiDUM Lecoq. & Lamotte. 

 Daisy; White-weed. — Fields, meadows and wood-roads; common. 



CICHORIUM. Chicory. 



C. Intybus L. Chicory. — Roadsides and waste places; frequent 

 in the valley but nowhere common. 



CIRSIUM. TmsTLE. 



C. arvense (L.) Scop. Canada Thistle. — Old fields, pastures, 

 roadsides and clearings; common. 



forma albiflorum (Rand & Redfield), n. comb. — Vid. Flora of 

 Mount Desert, p. 120. Frequent. 



var. integrifolium Wimm. & Grab. — Low field, Stockbridge. 



C. discolor (Muhl.) Sprang. Field Thistle. — Dry banks and 

 low open ground; frequent in the valley. 



C. Hillii (Canby) Fernald. — Edge of field, Egremont (Walters). 



C. lanceolatum (L.) Hill. Common or Bull Thistle. — Pas- 

 tures and clearings; common in the valley. 



C. muticum Michx. Swamp Thistle. — Swamps and wet woods ; 

 common. 



C. pumilum (Nutt.) Spreng. Pasture or Bull Thistle.— 

 (C. odoratum 111. Fl. ed. 2.) 



Pastures and open hillsides; common. 



