340 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
B. frondosa L. Common Beggar-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. radiata DC. Knapweed. — Waste ground, 
Pittsfield; dry fields, Sandisfield and Sheffield (Walters). 
CHRYSANTHEMUM. Ox-eye Daisy. 
C. leucanthemum L., var. pinnatifidum Lecoq. & Lamotte. 
Daisy; White-weed. — Fields, meadows and wood-roads; common. 
CICKORIUM. CmcoRY. 
C. Intybus L. Chicory. — Roadsides and waste places; frequent 
in the valley but nowhere common. 
CIRSIUM. Thistle. 
C. arvense (L.) Scop. Canada Thistle. — Old fields, pastures, 
roadsides and clearings; common. 
forma albiflorum (Rand & Redfield), n. comb. — l^id. Flora of 
Mount Desert, p. 120. Frequent. 
var. integrifolium Wimm. & Grab. — Low field, Stockbridge. 
C. discolor (Muhl.) Spreng. 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. 
