44. COMPOSITE. Ill 



North limit in Forfar, Holy Island, Westmoreland. 



Estimate of provinces 14. Estimate of counties 40. 



Latitude 50 — 57. English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 51 — 47. 



Native. Glareal, Pascual. In a general view this spe- 

 cies is clearly a plant of the " glareal " group ; and yet 

 some of its localities are in spots liable to be very wet in 

 the winter season, although dry and parched in summer : 

 for example, it occurs in the hollows among sand-hills on 

 the coasts, and in pastures where the soil is an admixture 

 of sand and clayey loam, holding wet through the winter, 

 and becoming hard and dry as a brick in summer. Light- 

 foot and Hooker say (Flo. Scot.) that the present species is 

 frequent in dry mountainous pastures in Scotland. I am 

 aware of only one Scottish county in which it is really as- 

 certained to occur, namely, that of Forfar. It is enume- 

 rated likewise in the Flora of Berwick-on-Tweed, but the 

 habitat is not strictly in Scotland, being on Holy Island. 



640. Erigeron canadensis, Linn. 



Area (1*3*56**9* 11). 



Alien. A species widely diffused about the earth, in 

 climates somewhat warmer than that of Britain ; having, 

 probably, accompanied the human race in their settlements. 

 In England it is of uncertain occurrence, and perhaps most 

 frequently met with in the province of Thames. 



