671 



" 517. Galium saxatile, Linn. 



u Area general. 



" South limit in Cornwall, Isle of Wight, Kent. 



" North lirait in Shetland, Orkney, Hebrides. 



" Estimate of provinces 18. Estimate of counties 82. 



" Latitude 50 — 61. British type of distribution. 



" A. A. regions. Inferagrarian — Superarctic zones. 



" Descends to the coast level, in the Peninsula. 



" Ascends to 1250 yards, in West Highlands. 



" Range of mean annual temperature 52 — 34. 



" Native. Ericetal. One of the most universally distributed spe- 

 cies in Britain, except that it has been banished from large tracts by 

 the farmer and gardener." — p. 16. 



As an example of a species equally widely distributed with Galium 

 saxatile over a horizontal area, but the upper limits of which are more 

 determinate, and require to be set forth more in detail, we will cite 

 the common Ling (Calluna vulgaris). 



" 695. Calluna vulgaris, Salisb. 



" 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 50 — 61. British type of distribution. 



" A. A. regions. Inferagrarian — Midarctic zones. 



" Descends to the coast level, in the Peninsula. 



" Ascends to 1100 yards, in East Highlands. 



" Range of mean annual temperature, 52 — 36. 



" Native. Ericetal. I have authority for the existence of this 

 well-known shrub in every county of Britain, with the exception of 

 Berks, Bucks, Northampton, Radnor, Montgomery, Flint, Lincoln, 

 Ayr, Haddington, and Linlithgow ; and in half of these ten counties I 

 have probably seen it myself. The upper line runs from 900 to 1100 

 yards, in the West of Aberdeenshire ; on and near Ben Lawers, in 

 Perthshire, so low as 750 to 900 yards ; about Drumochter Forest, in 

 the counties of Perth and Inverness, from 900 to 950 yards ; on and 

 about Ben Nevis, from 750 to nearly 900 yards ; about 800 yards in 

 the north-west of Sutherland. Mr. A. Petermann gives me the alti- 

 tudes of 2334 and 2328 feet, on Stob Choressan and Sgur Ghaoire, 

 two mountains near Ben Nevis." — p. 150. 



