CATALOGUE OF PLANTS. 47 
ARCTIUM, L. Burpock. 
A. Lappa, L., var. minus, Gray. 
Nat. from Eu. in all waste places; our common form. JB, 
M, S and BB, occasional. 
CNICUS, Tourn. Tuistrte. 
€. LANCEOLATUS, Hoffm. Common THISTLE. 
Nat. from Eu. in pastures, waste places, and by roadsides. 
B*, meadow by Pine Tree Brook: —M, common, especially 
along roadsides and in cult. ground; border of swamp, E. side 
of Bear Hill. 
C. muticus, Pursh. Swamp THIstLe. 
Swamps and low ground. 8B, occasional. 
C. pumilus, Torr. Pasture THISTLE. 
Dry pastures and roadsides. 6*, occasional; Pine Tree 
Brook valley, etc.: —M™*, frequent in open places; woods on 
slope of Bear Hill, etc. 
C. arvensis, Hoffm. Canapa THISTLE. 
Nat. from Eu. as a common and often troublesome weed in 
pastures, cult. fields, and by roadsides. M, frequent: — S, oc- 
casional. 
CENTAUREA, L. Srar THIistLe. 
C. Cyanus, L. Bacuetor’s Butron. CoRNFLOWER. 
Cult. from Eu. and escaped from gardens to roadsides and 
waste places. J, persisting from seed in old garden, Park’s 
place, Hawk Hill. 
C. nigra, L. KNAPWEED. | 
Ady. from Eu. in fields, waste places, and by roadsides. 
M*, well established on Forest St. and near N. Reservoir ; 
S. shore of Spot Pond, etc. 
KRIGIA, Schreb. Dwarr DANDELION. 
K. Virginica, Willd. 
Dry pastures and sandy places. £&*, common, especially on 
