HiU : Pettohxruf Plants. 303 



THE IXTRODUCEU FLORA OF THE EASTERN 

 PEXOBSCOT BAY REGION 



An account of tlie flora of the eastern Penobscot Bay region 

 wonld not be complete without some reference to the intro- 

 dneed plants. These are much less almndant than in most 

 parts of the country and comprise only 135 species. This 

 paucity is due chiefly to the absence of railroads or large 

 towns. 



The most conspicuous of the weeds of the area are plants 

 which have a more or less northern trend, among which may 

 be mentioned Carum Carvi and Matricaria suaveolens along 

 roadsides and about houses ; Hieracium pratense and H. 

 aurantiacum , too abundant in fields and pastures; Odontites 

 rubra in dry fields ; and Senecio sylvaticus, common in 

 gravelly soil at the edge of beaches and appearing almost 

 indigenous. 



The common weeds of the eastern United States are also 

 represented by such species as: 



Rumex Acetosella VcrJxiscuni Thapsus 



Stellaria media Cliri/saiithenium Leucaiit/ienruin , 



Capsella Bursa- pastor is var. pinnatifiduni 



Rauuncidus acris Taraxacum officinale 



Brassica nirjra SoncJius oleracnis 



Another type of introduced plants comprises fugitives from 

 the West. The most interesting of these is Pliacelia linearis, 

 a species of the Rocky Mountain region found in a l)arn-yard 

 at Brooklin, where it had obviously been introduced in grain. 



In addition to these plants, all of which occur spontan- 

 eously, there are many garden escapes which have become 

 well established, particularly in the neighl)orlioo(l of old 

 cellars or deserted houses. Often vigorous specimens of 

 Pijrus Malus are seen in the midst of a forest which has re- 



