86. GEAMINA. 177 



trust is unavoidable and warranted. The lowest stations 

 may likely occur in Yorkshire, but what is their altitude 

 remains to be shown ; possibly the Sesleria may descend 

 into the midagrarian zone. I have seen no specimen from 

 the Lake or North Highland provinces. 



1300. AiRA CiESPiTOSA, Linn. 



Area general. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Shetland, Orkney, Hebrides. 



Estimate of provinces 18. Estimate of counties 82. 



Latitude 60—61. British type of distribution. 



A. A. regions. Liferagi'arian — Midarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 1000 yards, more or less, in East Highlands. 



Eange of mean annual temperature 52 — 37. 



Native. Pratal, Paludal, &c. On account of the diffi- 

 culty of distinguishing between this species and A. alpina, 

 especially in then- viviparous states so usually found high 

 on the mountains, the upper limits cannot be positively 

 indicated. "When seen of small size, or viviparous, or at 

 high altitudes, this species is often called by the name 

 of A. alpina. 



1301. AiRA ALPINA, Linn. 



Area ****** [7 * * * 11] * * * 15 16 17 18. 

 South limit in Stirling, Perth, Forfar. 

 North limit in Hebrides, Sutherland. [Orkney.] 

 Estimate of provinces 4. Estimate of counties 10. 

 Latitude 56 — 59. Highland type of distribution. 



VOL. IIT. 2 A 



