EXPERIMENT STATION BULLETINS 177 



Bush-lloneysvickle, Diervilla irifida, Moench. 



Joe-Pye Weed, Eupatoriutn intrpureuin, L. 



Thoroiigliwort, E. perfoliatum, L. 



White Snake-root, E. ageratoides, L. 



Golden-rod, ^olidago uliginosa, Nutt. 



Golden-rod, H. Canadetisis, L. 



Golden- rod, 8. serotina, Ait. 



Aster, Aster macrophyllus, L. 



Aster, .-l. piiniceus, L. 



Aster, A. diffusus, Ait. 



Aster, A. paniculatus. Lam. 



Fleabane, Erigeron Canadensis, L. 



Pearly Everlasting, Anaphalis margaritacea, B. and H. 



Common Everlasting, Gnaphalium polycephaluni, Miehx. 



Common Everlasting, G. decurrens, Ives. 



Swamp Beggar-ticks, Bidens connata, Mulil. 



Smaller Bur-Marigold, B. ceniiia, L. 



Larger Bur-Marigold, B. chrysanthenioides, Michx. 



May-weed, Anthemis Cotula, D. C. 



Yarrow, Achillea Millifolium, L. 



Ox-eye or White Daisy, Chrysanthemum Leucanthemum, L. 



Wormwood, Artemisia biennis, Willd. 



Life-root, Senccio Balsamitae, Torr. and Gray. 



Fireweed, Erechtites hieracifolia, Eaf. 



Common or Bull Thistle, Cnicus lanceolattis, Hoffm. 



Swamp Thistle, C. muticus, Pursh. 



Canada Thistle, C. arvensis, Hoflm. 



White Lettuce, Prenanthes alba, L. 



Common Dandelion, Taraxacum officinale, Ueber. 



Wild Lettuce, Lactuca Canadensis, L. 



Wild Lettuce, L. leucophaea. Gray. 



Spiny-leaved Sow-Thistle, Sonchns asper, ^'ill. 



LIST OF INTRODUCED WEEDS. 



Tall Buttercups, Ranunculus acris. 

 Hedge Mustard, Sisymbrium officinale. 

 Tumbling Mustard, aS'. ultissimum. 

 Charlock, Brassica Sinapistriim. 

 Shepherd's Purse, Capsella Bursa-pastoris. 

 Field Cress, Lepidium campesire. 

 Night-flowering Catchfly, Silenc noctiflora. 

 Mouso-ear Chickweed, Ccrastium vulgatum. 

 Common Purslane, Portulaea oleracea. 

 May-weed, Anthemis Cotula. 

 Ox-eyo Daisy, Chrysanthemum Leucanthemum. 

 Canada Tliistle, Cnicus arvensis. 

 Bull Thistle, C. lanceolattis. 

 Common Dandelion, Taraxicum officinale. 

 Spiny-leaved Sow-Thistle, Sonchus asper. 

 Stick-seod, Echinospcrmum Lappula. 

 Common Hound's Tongue, Cynoglossum officinale. 

 Common Hemp-Nettle, Oaleopsis Tetrahit. 

 PigNveed, Amarantus retroffexus. 

 Lamb's Quarters, Chenopodium album. 

 Narrow-leavod Dock, Rumex crispus. 

 Bitter Dock, R. obtusifolius. 

 I^ady's 'J'humb, Polygonum Pcrsicaria. 

 Quack (uass, Agropyron repcns. 

 Goose Grass, Polygonum aviculare. 

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