240 



ESS A YS. 



Genista tinctoria. 

 Trifolium arvense. 

 Trifolium agrarium. 

 Trifolium repens. 

 Daucus Carota. 

 Pastinaca sativa. 

 Conium maculatum. 

 Tussilago Farfara. 

 Inula Heleniiini 

 Gnaphalium uliginosum. 

 Anthemis Cotula. 

 Achilloza Millefolium. 

 Tanacetum vulgare. 

 Leucanthemum vulgare, 

 Cirsium arvense. 

 Cirsium lanceolatum. 

 Lappa officinalis. 

 Cichorium Intybus. 

 Leontodon autumnale. 

 Taraxacum Dens-leonis. 

 Plantago major. 

 Plantago lanceolata. 

 Anagallis arvensis. 

 Verbascum Thapsus. 

 Verbascum Blattaria. 

 Linaria vulgaris. 



Mentha viridis. 

 Mentha piperita. 

 Calamintha Nepeta. 

 Calamintha Clinopodium. 

 Nepeta Cataria. 

 Nepeta Glechoma. 

 Marrubium vulgare. 

 Galeopsis Tetrahit. 

 Leonurus Cardiaca. 

 Lamium amplexicaule. 

 Echium vulgare. 

 Symphytum officinale. 

 Echinospermum Lap- 



pula. 

 Cynoglossum officinale. 

 Solarium nigrum. 

 Chenopodium album. 

 Chenopodium hybri- 



dum. 

 Chenopodium Botrys. 

 Polygonum aviculare. 

 Polygonum Convolvu- 

 lus. 

 Rumex crispus. 

 Rumex sanguineus. 

 Rumex Acetosella. 



Allium vineale. 

 Alopecurus pratensis. 

 Phleum pratense. 

 Agrostis vulgaris. 

 Agrostis alba. 

 Dactylis glomerata. 

 Poa annua. 

 Poa compressa. 

 Poa pratensis. 

 Poa trivialis. 

 Eragrostis poaeoides. 

 Festuca ovina. 

 Festuca pratensis. 

 Bromus secalinus. 

 Lolium perenne. 

 Triticum repens. 

 Triticum caninum. 

 Anthoxanthum odora- 



tum. 

 Panicum glabrum. 

 Panicum sanguinale. 

 Panicum Crus-galli. 

 Setaria glauca. 

 Setaria virdis. 



The plants of «fchis list, regarded as weeds, are of very vari- 

 ous character ; and several of them, such as White Clover 

 and most of the Grasses, where most dominant, do not fall 

 under the ordinary definition of weeds at all, but under that 

 of plants useful to the farmer. Some, like Purslane, are only 

 garden weeds ; some belong to pastures and meadows ; others 

 affect roadsides. The fewness of European corn- weeds is 

 remarkable. Ches and Corn-cockle (Lychnis Githarjo) are 

 the only ones on the list. Corn Poppy, Bluebottle and Knap- 

 weed (Centaurea Cyanus and 0. nigra) and Larkspur are 

 conspicuously wanting ; but the last two are not wholly un- 

 known in some parts of the country. 



But the only question before us is, whether these plants in- 

 troduced from Europe are or are not self -fertilized, or more 

 habitually so than others, so that this may be accounted an 



