BY JOHN H. SEARS. 99 



ORDER Composites. 



Asters and Goldenrods. These pretty plants are weeds in fence 

 rows, on the borders of fields and in pastures. They are hard to 

 dislodge. 



Horse-weed, Butter-weed, Erigeron Canadensis, grows on roadsides 

 and in fields. Very common. 



Roman Wormwood, Ambrosia artemisicefolia. This weed is common 

 in all parts of the United States east of the Rocky mountains. It is a 

 compositffi, with sterile and fertile heads, occupying different parts of 

 the same plant. 



Spiny Clotbur, Xanthium spinosrim, waste places on the seacoast, 

 and established as a weed in Peabody and Danvers. From tropical 

 America. 



Cone Flower, Eudbeckia hirta, a common weed in mowing lands. It 

 was introduced with clover seed from the west, and is native on the 

 prairies of Wisconsin and southward. 



Tick-seed, Coreopsis trichosperma, and common Beggar's Tick, 

 Bidens frondosa, are coarse weeds, the seeds adhering to the dress and 

 to the fur of animals, and are thus disseminated. 



May-weed, Maruta Cotula, roadsides and dooryards. A very com- 

 mon weed. European. 



Yarrow, Achillea MillefoUum, waste places and around dwellings. 

 Common. European. 



Ox-eye Daisy, Leucanthemum vulgare, White weed, fields and pas- 

 tures. Too abundant. European. In Hanson's history of Danvers, 

 page 47, it is said that Edward Grover planted it in his garden as an 

 herb in 1633 at Salem Village. 



Common Tansy, Tanacetum vulgare, escaped from old gardens. 

 Grows in dense patches by roadsides and in fields. European. 



Common Everlasting, Gnaphalium polycephalum, grows everywhere 

 in pastures and old fields. 



Fire-weed, Erechthites hieracifolia, common in recent clearings 

 where the ground has been burnt over. 



Canada Thistle, Cirsium arvense, a most troublesome weed in hay 

 fields. European. 



Burdock, Lappa officinalis, waste places and around dwellings. It 

 is an unsightly weed. European. 



