80 Agricultural Botanij. Vol. VI. 



121. CicHORiuM iNtYBUs, L. Wild Succory. A worthless weed ; becoming frequent in 



the northern disiricts of Chester county. 



122. Leontodon Taraxacum, L. Dandelion. A common, well-known weed, 

 12;}. SoNCHUs Oleraceus, L. Sow Thistle. A frequent weed, in cultivated lots. 



12-4. Vernonia Prj^alta, Willd. Iron Weed. A troublesome pest, in moist meadows. 



125. EupATORiuM Perkoliatum, jL. Thorough-stem: Thorough-wort. A frequent weed, 

 in wet meadows and low grounds. Generally known as possessing medicinal pro- 

 perties. 



12G. SoLiDAGo, L. Golden Rod. A numerous genus ; of which some of the species abound 

 as weeds, in old fields and along fence-rows, 



127. Aster, L. Star-iwrt. Anotiier numerous family ; some of which (as A. Tenuifolius, 



or Ericoides, L.) are troublesome weeds in our pastures. 



128. P^rigeron Canadensis, L. Horse-weed, i Worthless weeds; generally abundant in our 



I'ji). K Strigosus, Z(. Flea-bane. > pastures, and especially in the first crop of 



l;30. E Heterophyllus, Mulil. ) upland meadows. 



131. Xanthium Strumarium, L. Clot-bur. A common nuisance, in waste grounds, road- 



sides, &c. 



132. X Spinosum, L. Thorny Clot-bur. A most vile pest, wherever it appears; 



rare, as yet, in Chester county. 



133. Ambrosia Trifida, L. A coarse, worthless weed ; in waste grounds, fence-rows, &c. 



134. A Elatior, 2y. Bitter-weed: Rag-weed. A common nuisance; generally 



abundant in stubble-fields, after harvest. 



135. BiDENs Chrysantiiemoides, Mx. Beggar Ticks. A frequent nuisance, in swampy 



meadows, along rivulets, &c. 



136. B Frondosa, L. ) Spanish Needles. Troublesome pests, about gardens and 



137. B BipiNNATiFiDA, L. \ Cultivated lots. 



138. Anthemis CoTULA, Z«. Stinking Chamoinile: Dog''s Fennel: Richardson's Pink. 



A troublesome, fetid little nuisance; common in waste grounds, lanes, and pasture 

 lots. 



139. Achillea Miixefolia, iy. Yarrow: Milfoil. A common weed in our pastures; 



considered entirely worthless here, though English writers speak of it as being food 

 for cattle. 



140. Chrysanthemum Leucanthemum, Z. Daisy: Ox-eye Daisy. A vile pest; becom- 



ing very abundant on many farms in the north-eastern portion of our county, — and 

 will doubtless soon pervade the whole country. 



141. Gnaphalium Polycephalum, L. Life Everlasting. A frequent weed, in old fields 



and pasture-grounds. 



142. Senecio Hieracifolius, L. Fire-weed. A coarse weed; common in new grounds, 



especially in and around spots where brush heaps have been burnt. 

 14-3. Euphorbia HvpERiciFOLiA, jy. Spurge: Eyebrighl. An acrid little weed, full of 



milky juice; common in pastures and cultivated grounds. This, like the Lobelia, 



has been suspected of causing the slabbers in horses : how justly, has not been 



ascertained. 

 144. Uktica Pumila, L. Rich Weed. A common weed, in rich moist grounds, about 



houses, &c. 

 14.^). U Diok'a, L. Nettle. A well-known pest, in waste grounds, &c. 



146. Amarantiius Albus, L. A coarse, branching weed ; about barn-yards and waste 



grounds. 



147. A Hybridus, L. A coarse, troublesome weed, in gardens and cultivated lots. 



lis. A SpiNosus, L. A still more pernicious species; but rare, as yet, in this 



region. 



149. Cucurrita Pepo, L. Pumpkin. Generally cultivated, among Indian-corn, &.c., as 



food for stock. 



150. Smilax Caduca, L. Green Briar. A troublesome nuisance, in poor, old neglected 



fields. The S. Rotundifolia, L., is another well-known pest, in thickets and 

 clearings. 



The foregoing Catalogue comprises the more obvious of the plants known to our farmere, 

 either for their usefulness, or as weeds and pests. Of the useful plants, there are but 

 about ,35 species in the list, of which some 25 are more or less objects oi field culture; 

 leaving the large proportion of more than three-fourths of pernicious or worthless weeds, 

 to be extirpated, or kept in due subjection. To do this, requires both skill and vigilance; 

 and every one will admit, that an important preliminary step will be to acquire an accurate 



