4. CRUCIFERiE. 125 



Estimate of provinces 16. Estimate of counties 60. 



Latitude 50 — 58. British type of distribution. 



Agrarian region. Inferagi-arian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperatm-e 51 — 46. 



Native. Agrestal, &c. Though more an agrestal plant 

 than aught else, this occurs on banks and pasture ground 

 in clayey soil, and by road-sides, like the L. Smithii. As 

 far as my compilations of their localities go, the present 

 species occurs in forty-two counties, and L. Smithii in 

 forty ; but I estimate their actual distribution considerably 

 liigher. 



71. Lepidium ruderale, Linn. 



Area 1 2 3 4 5 (6 * * * 10 11 * .^^ * 15). 



South limit in Cornwall, Hants, Kent. 



North limit in Norfolk and near Bristol. 



Estimate of provinces 6. Estimate of counties 12. 



Latitude 50 — 53. English type of distribution. 



Agrarian region. Inferagi-arian zone. 



Descends to the coast level, in the Peninsula. 



Ascends, about the coast level, to the Ouse. 



Range of mean annual temijeratm-e 52 — 49. 



Native. Littoral. Not strictly a maritime species, and 

 yet scai-ce wild in this country except along the coast, from 

 Norfolk round to Bristol. In South Wales and the province 

 of Tyne, the habitats ai-e expressly restricted to " ballast 

 hills" or " ballast banks;" and in Yorkshire, the locahty of 

 "Scarborough pier," on old authority only, looks suspicious. 

 I have estimated the provinces to be six, however, on the 

 likely supposition that a coast plant, said to be frequent 



