80. GRAMINA. 207 



enjoying any great credit for being too backward in 

 stating unwelcome facts or unpleasing opinions. 



1334, e. PoA BALFOURn, " Parn." 



Area *-***** 7 * * 10 11 * * * 15 16. 



South, limit in Caernarvon, York. 



North limit in Dumbarton, Perth, Forfar. 



Estimate of provinces 5. Estimate of counties 6. 



Latitude 53 — 57. Highland type of distribution. 



Arctic region. Midarctic zone. 



Descends to 800 yards, or lower. 



Ascends to 1000 yards, more or less. 



Range of mean annual temj)eratm'e, say 40 — 37. 



Native, Rupestral. A doubtful species, resembling 

 both P. caesia and P. Parnellii. Aj)j)earing to pass gradu- 

 ally and more completely into the former, through wild 

 specimens from the counties of Perth and Forfar, while a 

 difference is still obvious to the eye, between Balfoui'ii 

 and Parnellii, cultivated together in an English garden, 

 although it is a difference not readily to be described, in 

 tecknical language. I cannot conciu- with Messrs. Hooker 

 and Arnott in aggregating together, under name of P. ne- 

 moralis, all the mountain gi'asses called severally P. 

 montana, Parnellii, Balfourii, csesia, and glauca; but I 

 do fear they have been too much separated by Mr. Ba- 

 bington, on slight and inconstant characters. To the 

 above five counties, that of Northumberlond is to be 

 added for P. Balfourii, and perhaj)s that of Aberdeen 

 likewise. 



