12. CARYOPHYLLACE^. 213 



dred yards, in consequence of receiving a specimen from 

 Mr. Brand, labelled " subulata," which I cannot pass over 

 to saginoides, and which my talented friend collected on 

 the Clova mountains, near Loch Brandy. S. subulata ap- 

 pears very likely to occur in the provinces of Severn and 

 South Wales. Its occurrence in the three most southerly 

 provinces forbids the assignment of it to the boreal or 

 Scottish type, which its area might otherwise seem to 

 indicate: 



171. Spergula nodosa, Linn. 



Area, general. 



South limit in Cornwall, Isle of Wight, Kent. 

 C/t!^^ North limit in Orkney and Hebrides. 



Estimate of provinces 18. Estimate of counties 75. 



Latitude 50 — 60. British type of distribution. 



Agrarian region. Inferagrarian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 500 yards, in East Highlands. 



Range of mean annual temperature 52 — 42. 



Native. Inundatal, &c. Not a very common species, 

 although its localities are quite beyond count, and its area 

 includes almost the whole of Britain. This species, 

 among several others so affected, appears to have its cli- 

 matic range extended by the presence of limestone. It is 

 rare in the Highland provinces. Only in one spot have I 

 seen it at any considerable elevation ; and there it was 

 growing in and about a quarry of limestone, in Glen Beg, 

 Perthshire, at 1530 feet of altitude, which brings it slightly 

 within the boundaries of the Arctic region. Inhabits va- 

 rious situations, from marshes even to stone walls. 



