204 86. GRAmNA. 



Native. Pratal, Pascual, &c. I have no note of seeing 

 this above 750 yards. Dr. Dickie reports it so high as 

 2900 feet in Aberdeenshii-e ; and his higher measm-ement 

 is here adopted. As for the two sub-species, carved oif 

 P. i)ratensis, it is difficult to separate them as varieties 

 only by well defined characters ; and hence no attempt is 

 here made to treat their distribution apart from that of 

 the species in the aggi'egate. 



1332. PoA TRiviALis, Linn. 



Area general. 



South limit in Cornwall, Isle of Wight, Kent. 



Noi-th limit in Shetland, Orknej^, Hebrides. 



Estimate of provinces 18. Estimate of counties 82. 



Latitude 50 — 61. British type of distribution. 



A. A. regions. Inferagrarian — Midarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 800 or 850 yards, in East Highlands. 



Range of mean annual temperature 52 — 39. 



Native. Pratal, Sylvestral, &c. One of the j)lants be- 

 fore alluded to (Cybele, vol. ii. p. 369) as growing with 

 Ui'tica dioica and Stellaria media, high on the Breadal- 

 bane mountains ; but elsewhere not observed by myself 

 above 700 j^ards of altitude. As with various other low- 

 land gi'asses, however, the upi^ermost limits of this one 

 may be readily overlooked on the exposed sheep-pastures 

 of the moimtains, where the plants are prevented from 

 flowering freely, by the nibbling of the sheep and the 

 A'iolence of the winds. 



