TORREYA 



February, 1915. 

 Vol. 15 No. 2 



NOTES ON PLANTS OF THE CHICAGO REGION 



By E. J. Hill 



However long one may have botanized in a given locality, or 

 carefully gone over the ground, new plants will be met with 

 from time to time. Some are migrants, and a strange plant is 

 likely to greet the collector by railroad or wayside or in patches of 

 waste ground at any time. The majority of these in inland 

 regions are beside railroads, migration being favored by slow 

 advance along the right of way or by seed dropped from cars 

 loaded with grain or stock. Others native to the section may be 

 of very limited range, closely restricted in that region to some 

 particular locality and for this reason they may have been over- 

 looked. One may have gqne all around that special place many 

 times, or been almost in contact with the plant, but not being ex- 

 actly there has failed to see it. Such plants seem almost like new- 

 comers. It may be that some of them are, since they are within 

 the bounds of their general geographic range, but more or less 

 local in habitat. Others can be credited to the recent marked 

 development in the segregation of species, either in the making 

 of new ones or, by more careful monographing, the separation 

 of those that have been confused. The herbarium of many years' 

 standing, as well as the open field, will become ground for ex- 

 ploration in this respect. Hence we are not likely soon to fail 

 in work along systematic and taxonomic lines, and though the 

 problem of new species may be overweighted, some, perhaps 

 many, will doubtless stand, and clearer views will be obtained of 

 all. 



Among genera recently monographed that of Panicum by 



[No. I, Vol. 15, of ToRREYA, Comprising pp. 1-20, was issued 25 January 1915.] 



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