276 Proceedings Port. Soe. Nat. Hist. 



I. Widespread Plants — 54 species, 9 per cent of the 

 flora. 



II. Boreal Plants — 95 species, 16 per cent of the flora. 



III. Canadian-Alleghanian Plants — 383 species, 62 per 

 cent of the flora. 



IV. Alleghanian Plants — 56 species, 9 per cent of the flora. 

 V. Carolinian Plants — 18 species, 3 per cent of the flora. 



VI. Local Plants — 6 species, 1 per cent of the flora. 



The relative importance of the various groups in the make- 

 up of the flora is shown graphically in Figure 1. As would 

 be expected from the location of the eastern Penobscot Bay 

 region the largest percentage of its flora consists of Canadian- 

 Alleghanian species. 



Group I. Widespread PLA^'TS 



It will l)e possible to dismiss this group with but little 

 comment. Its 54 species are very widely distributed and 

 occur in various habitats, for the most part throughout east- 

 ern North America save in the extreme north. As examples 

 may be cited : 



Polypodium vulgare Cardmnine pennsylvanica 



Equisetum. arvense CcdlitricJie pcdustris 



Typlia laiifolia Veronica serpijUi folia 



Agrostis hye^nalis Orohanclie uniflora 



Carex scoparia Planiago major 



J uncus hufonius Erigeron canadensis 



Polygovum sagiilaiinn AehiJJea ]\IiJlefoJium 



Group II. Boreal Plants 



This group comprises 95 plants of the Arctic-alpine and 



Hudsonian zones according to Merriam's classification. In 



phytogeographical literature the terms arctic^, sub-arctic, 



arctic-alpine, alpine and sub-alpine have all been used more 



