220 12. CARYOPHYLLACEiE. 



181. Arenaria rubella, Hook. 



Area ^^^:j^^^^^^.^^^^^^ib^\7. 



South limit in Perthshire. 



North limit in Sutherland. 



Estimate of provinces 2. Estimate of counties 2. 



Latitude 56 — 59. Highland type of distribution. 



Arctic region. Midarctic — Superarctic zones. 



Descends to 850 yards, in East Highlands. 



Ascends to 1300 yards, in the same province. 



Range of mean annual temperature 38 — 34. 



Native. Rupestral. An extremely local plant, hitherto 

 found only on the Breadalbane mountains, in Perthshire, 

 and on Ben Hope, in Sutherland. The altitude of 1300 

 yards is given on faith of Mr. Brand, who found this spe- 

 cies "near the top of Ben Lawers, above the station of Saxi- 

 fraga cernua." It has been suggested that Arenaria rubella 

 is an arctic variety of A. verna, and this view appears to be 

 countenanced by a very good European botanist, Mr. Ball. 



Arenaria fastigiata, Sm. 



Area * [15]. 



Incognit. " On the rocks on the mountains of Angus- 

 shire and Fifeshire. Mr. G. Don.^^ 



• 182/ARENARliy RUBRA, im«. /u. />/. ///.^O^^ 



Area, I 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 [18]. 

 South limit in Cornwall, Isle of Wight, Kent. 



