12. CARYOPHYLLACEiE. 217 



Native. Rupestral or Glareal. Extremely local ; having 

 been found only in Shetland. Mr. Edmondston estimated 

 that it grew at about 200 feet above the sea level; and from' 

 his remarks on this one, in connexion with other plants, I 

 presume that it occurs above the limit of cultivation there. 

 Its station is " on the loose barren gravel of a serpentine hill, 

 immediately to the north and north-east of Baltasound, 

 Unst." Its distinctness, as a species, appears questionable. 



178. Arenaria serpyllifolia, Linn, 



Area, general. 

 h.y//}jj South limit in Cornwall, Isle of Wight, Kent. 

 ■^^ North limit in Orkney, Sutherland, Hebrides. 



'^Estimate of provinces 18. Estimate of counties 81. 

 Latitude 50—60. British type of distribution. 

 Agrarian region. Inferagrarian — Superagrarian zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends to 100 or 200 yards, in England. 

 Range of mean annual temperature 52 — 46. 

 Native. Agrestal and Glareal. A common species ; but 

 more plentiful in the south than in the north. Absent from 

 the Shetland Flora; and known as a native of Orkney, only 

 on the faith of Lowe's hst. ^?vyz,o) A^ ^«r' ^ -4- 4/^fAJ^ 



/W. ///', ^ . 3^^ 179, Arenaria tenuifolia, Linn. 



Area 12345* [7** 10*** 14 15]. 

 South limit in Devon (?), Sussex, Kent. 

 North limit in Norfolk and Warwickshire. 

 Estimate of provinces 6. Estimate of counties 15. 

 Latitude 50—53. English type of distribution. 



2 F 



