140 4. CRUCIFEKyE. 



ties are too suspicious for tmst. In Sussex, it is sup- 

 posed to have been introduced to the neighboui'hood of 

 Slinfold. In the provinces of Mersey and Lakes, C. 

 sylvatica has hkely been mistaken for the present species. 

 The localities on the banks of Doune and Clyde, in 

 the West Lowlands, seem to require confii'mation. 

 That of Aiisaig, in the West Highlands, is sm'ely an 

 en'or. 



Cardamine bellidifolia, Linn. 



Incognit. Reported, on old authority, from the coun- 

 ties of Somerset, Denbigh and York ; but since this spe- 

 cies cannot be foimd in any of the alleged localities, while 

 Arabis hirsuta does occm* in most or all of them, there can 

 be little question that the Ai'abis was mistaken for the 

 Cardamine. 



88. Arabis thaliana, Linn. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 17 18. 



South limit in Devon, Isle of Wight, Kent. C4^^t^^*^ 



North limit in Orkney and Ross-shire. 



Estimate of provinces 18. Estimate of counties 80. 



Latitude 50 — 60. British type of distribution. 



Agrarian region. Inferagi'arian — Superagrarian zones.' 



Descends to the coast level, in the Peninsula. 



Ascends to 200 or 300 yards, in Lake province. 



Range of mean annual temperature 51 — 45. 



Native. Rupestral, &c. In various situations, as culti- 

 vated ground, banks, waUs, rocks, and even in woods, 

 where the vegetation is thin. Reported from forty-fom- 



I 



