66 
Bidens frondosa, Z. (COMMON BEGGAR-TICKS.) 
A common weed. 
Bidens connata, Muhl. (Swamp BeGGar-TICKs. ) 
Frequent. West Newbury (W. P. Conant); Lynn (Tracy); etc. 
Forms of this species are sometimes mistaken for B. cernua. 
Bidens chrysanthemoides, Michx. (LARGER BUR-MARIGOLD.) 
Common in swamps. (B. cernua in Tracy’s Lynn Flora.) 
Bidens Beckii, Torrey. (WaTER MARIGOLD.) 
Hamilton, 1857 (G. D. Phippen); Ipswich river; Crane pond, West 
Newbury (J. R.); and occasionally elsewhere. Scarce. 

Helenium autumnale, Z. (SNEEZE-WEED. ) 
Danvers (J. H. Sears). A western species of recent introduction. 
Maruta Cotula, DC. (Common May-wEeED.) 
Very common by roadsides, and in yards in the country towns. 
The English name does not apply here, as it does not flower until 
July or the last of June. (Nat. from Eu.) 
Achillea Millefolium, Z. (Yarrow.) 
Common in fields, etc. The pink variety is found in Georgetown 
(Mrs. Horner) ; Lowell Island, Salem Harbor (G. D. Phippen) ; and 
now and then in other places. 
Achillea Ptarmica, ZL. (SNEEZEWORT.) 
‘‘Danvers, Mr. Oakes” (Bigelow’s Fl. Bost. 3d ed. 1840). ‘*Dan- 
vers locality thought to be destroyed” (memo. J. H. Sears 1875); 
‘¢occasional in Lynn” (Tracy); Salem (Rev. J. L. Russell); ‘‘ Lynn 
woods” (memo. G. D. Phippen). Scarce. (Adv. from Eu.) - 
Leucanthemum vulgare, Lam. (WHITEWEED.) 
‘‘Fields and meadows: too abundant” (Gray’s Manual). ‘* Very 
injurious to grass lands” (Rev. M. Cutler, 1783, Proc. Am. Acad. 
Vol. I). A very curious monstrosity of this very common species 
was found at Wenham by Laurence G. Kemble having twelve 
smaller heads arising from the first one, thus beautifully illustrating 
the construction of a composite flower. (Nat. from Eu.) 
Leucanthemum Parthenium, Godron. (FEVERFEW.) 
Common in old gardens and occasionally escaping as in Byfield, 
North Andover, etc. (Adv. from Eu.) 
Pyrethrum Tanacetum, DC. (Matricaria Tanacetum, Wood’s 
Bot. and Fl., M. Balsamita, Wood’s Cl. Bk.) Misery Island, Salem 
Harbor, near an old farm. (Adv. from Eu.) 
Tanacetum vulgare, ZL. (ComMMON TANSY.) 
Roadsides. Very common. (Nat. from Eu.) 
Var. crispum. 
Beverly and elsewhere. Not socommon. (Nat. from Eu.) 

