CHAPTER X. 



GENERAL REMARKS ON THE PRECEDING CATALOGUE. 



Although the territory represented by the foregoing Cata- 

 logue does not extend into the Upper Peninsula, it nevertheless 

 embraces a portion of the "Lake Superior Land District" as 

 reported upon by the Botani.si of Foster and Whitney's Survey. 

 Within this portion of their territory, we have detected 95 spe-* 

 cies of plants not enumerated in W. D. Whitney's Catalogue. 



The number of species embraced in this Catalogue is 214 

 more than in the Catalogue formerly published by Dr. Wright. 



The total number of species enumerated (excluding varie- 

 ties) is 1205. . Of these, 85 species are of foreign origin. The 

 introduced species embrace a large proportion of our common 

 weeds The Black Mustard ( ' Sinapis nigra), Shepherd's Purse 

 (Capsella Bursa-pastoris), Mouse-Ear (Cerastium vulgatum and 

 G. viscosum), Purslane (Portulaca oleracea), Mallows (Malva 

 roiundifolia), Corn "Speedwell (Veronica arvensis), Pigweeds 

 ( Ghenopodium hybridum and G. album), Amaranths (Amarantus 

 hybridus and A. retqflexus), Princes Feather (Polygonum orien- 

 tate), Sorrel (Rumex acetosella), Crabgrass (Panicum sangui- 

 nale), and the Foxtail grasses (Setaria glauca and S. viridis), 

 are common garden nuisances, and several of them spread 

 themselves extensively through cultivated fields. The follow- 

 ing more rarely encroach upon our gardens, but make them- 

 selves at home in cultivated and pasture fields : Buttercups 

 (Ranimctdus acris), Horse Eadish (Nasturtium armoracia), 

 Field Mustard (Sinapis arvensis), Cockle (Agrostemma Githago), 

 Sandwort (Arenaria serpyllifolia), Chickweed ( Stellaria media), 

 Bladder Ketmia (Hibiscus Trionum), White Melilot (Mdilotus 

 alba), Common Daisy (Lecanthemum vulgare), Groundsel (Sene- 

 cio vulgaris), Common and Canada Thistles (Cirsium lanceola- 



