CATALOGUE OF PLANTS. 



47 



ARCTIUM, L. Buedock. 



A. Lappa, L., var. minus, Gray. 



Nat. from Eu. in all waste places; our common form. 

 M, S and B B, occasional. 



B, 



CNICUS, Tourn. Thistle. 



C. 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. B, occasional. 

 C. pumilus, Torr. Pasture Thistle. 



Dry pastures and roadsides. B*, occasional; Pine Tree 

 Brook valley, etc. : — If*, frequent in open places ; woods on 

 slope of Bear Hill, etc. 

 C. aevensis, Hoffm. Canada Thistle. 



Nat. from Eu. as a common and often troublesome weed in 

 pastures, cult, fields, and by roadsides. M, frequent : — 8, oc- 

 casional. 



CENTAUREA, L. Star Thistle. 

 C. Cyanus, L. Bachelor's Button. Cornflower. 



Cult, from Eu. and escaped from gardens to roadsides and 

 waste places. B, persisting from seed in old garden, Park's 

 place, Hawk Hill. 

 C. nigra, L. Knapweed. 



Adv. 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, Sclireb. Dwarf Dandelion. 

 K. Virginica, Willd. 



Dry pastures and sandy places. B *, common, especially on 



