68 
Centaurea nigra, Z. (KNAPWEED.) 
*‘One specimen on railroad roadbed Swampscott” (Tracy); Dan- 
vers (Oakes); ‘‘ Dark Lane, Salem” (memo. G. D. Phippen), now 
extinct; Marblehead (G. D. Phippen); Topsfield. Not very com- 
mon except in the last named locality. (Adv. from Eu.) 
Cirsium lanceolatum, Scop. (ComMMoN THISTLE.) 
Common. Roadsides, etc. (Nat. from Eu.) 
Cirsium discolor, Spreng. 
‘*Rare in Lynn” (Tracy); near Salem or Wenham, 1824 (Dr. Chas. 
Pickering); Danvers, etc. Not avery common species. 
Cirsium muticum, Michx. (Swamp THISTLE.) 
Wenham swamp, 1824-6 (Dr. Chas. Pickering); Danvers, Methuen, 
Amesbury, etc. Frequent in low grounds. 
Cirsium pumilum, Spreng. (PasTURE THISTLE.) 
Fields, etc. Common. A fragrant and handsome flower. 
Cirsium horridulum, Miche. (YELLOW THISTLE.) 
Cape Ann and about Salem, 1824 (Dr. Chas. Pickering) ; Manchester 
(G. D. Phippen); Pigeon Cove; Plum Island. Rather scarce. 
Cirsium arvense, Scop. (CaNapDA THISTLE.) 
A very troublesome weed. (Nat. from Eu.) 
Onopordon acanthium, Z. (CoTTon THISTLE.) 
Little Nahant, Lynn, Salem Neck. Generally near the shore but 
seen in Boxford, perhaps introduced with rock-weed manure from 
some beach. (Ady. from Eu.) 
Lappa officinalis, Allion?. (BurpDocK.) 
Common everywhere. (Nat. from Eu.) 
Lampsana communis, Z. (NIPPLE-woRT.) 
Salem, 1857 (Rev. J. L. Russell); Norman St., Salem, 1877 (J. R.). 
Rare. (Adv. from Eu.) 
Cichorium Intybus, LZ. (Cicuory.) 
‘‘Fields in Cambridge,” 1783 (Dr. Manasseh Cutler in Mem. Am, 
Acad., Vol. 1). This would seem to indicate that at this time it had 
not reached Essex Co. Bigelow (1814) speaks of it as ‘‘ everywhere 
in the vicinity of Boston.” Very abundant on the roadbed of the 
Eastern railroad at Somerville and Lynn; Salem near March St., 
etc.; Gloucester (Mrs. Babson); Ipswich, Newburyport. Increas- 
ing. (Nat. from Eu.) 
Krigia Virginica, Willd. (Dwarr DANDELION.) 
Common on dry hills. Flowers a beautiful orange color, heads small. 

