86. GRAlvaNA. 211 



is probably very near truth ; but how far below that alti- 

 tude either species has been found, I am unprepared to 

 say. In bygone years I had received P. laxa under name 

 of P. alpma, from Scottish botanists, and kept it as such 

 in my herbarium until quite recently ; its viviparous con- 

 dition perha^js tending to prevent any very close examina- 

 tion into the accuracy of the labelling. 



1335. Bbiza media, Linn. 



Area general ? 



South Kmit in Cornwall, Isle of Wight, Kent. 



North limit in Orkney, Ross. 



Estimate of provinces 18. Estimate of counties 75. 



Latitude 50 — 60. British tj-pe of distribution. 



A. A. regions. Inferagrarian — Inferarctic zones. 



Descends to the coast level, in the Peninsvila. 



Ascends to 600 or 650 yards, in East Highlands 



Range of mean annual temperatm'e 52 — 40. 



Native. Pratal. Apparently scarce above the agi'arian 

 region, and in the thi'ee most northern and north-western 

 provinces. It was included in Lowe's Orkney Hst, and has 

 been also seen in the same isles by Mr. J. T. Syme, who 

 thought it might have been introduced. As an authority 

 for the North Highlands, the name is marked in the 

 checked catalogue of Ross-shii'e plants, received from the 

 Rev. George Gordon. For the West Highlands, I am 

 not prepared to adduce any more certain authority than 

 the Flora Glottiana, in which B. media is said to occur 

 " occasionally " ; and as that Flora enumerates the " indi- 

 genous plants on the banks of the Clyde, and in the 

 neighbourhood of Glasgow", such a qualified general in- 

 dication cannot certainly imply the existence of B. media 



