66 



Bideus frondosa, L. (Common Beggar-ticks.) 



A common weed. 

 Bidens connata, Muhl. (Swamp Bkggak-ticks.) 



Frequent. West Newbury (W. P. Conant) ; Lynn (Tracy) ; etc. 



Forms of this species are sometimes mistaken for B. cernua. 

 Bidens chrysanthemoides, Mickx. (Larger Bur-marigold.) 



Common in swamps. (B. cernua in Tracy's Lynn Dora.) 

 i^ideus Beckli, Torrey. (Water Marigold.) 



Hamilton, 1857 (G. D. Pliippen) ; Ipswich river ; Crane pond, West 



Newbury (J. E.) ; and occasionally elsewhere. Scarce. 



Helenium autumnale, L. (Sneeze-weed.) 

 Danvers (J. H. Sears). A western species of recent introduction. 



Maruta Cotula, DO. (Common May-weed.) 

 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, L. (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, X. (Sneezbwort.) 



"Danvers, Mr. Oakes" (Bigelow's Fl. Bost. 3d ed. 1840). "Dan- 

 vers locality thought to be destroyed" (memo. J. H. Sears 1875); 

 " occasionalin Lynn " (Tracy) ; Salem (Rev. J. L. Russell) ; "Lynn 

 woods" (memo. G. D. Phippen). Scarce. (Adv. from Eu.) 



Leucanthenmin vnlgare, 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 Byfleld, 

 North Andover, etc. (Adv. from Eu.) 



Pyrethrum Tanaeetum, DC. (Matricaria Tauacetum, Wood's 

 Bot. and Fl., M. Balsamita, Wood's CI. Bk.) Misery Island, Salem 

 Harbor, near an old farm. (Adv. from Eu.) 



Tanaeetum vulgare, L. (Common Tansy.) 



Roadsides. Very common. (Nat. from Eu.) 

 Var. crispum. 



Beverly and elsewhere. Not so common. (Nat. from Eu.) 



