294 88. PTERIDIOIDES. 



Latitude 53 — CO (59). Highland type of distribution. 



A. A. regions. Superagrarian — Midarctic zones. 



Descends to 50 j^^ards, in West Highlands (Syme). 



Ascends to 900 yards, in East Highlands. 



Range of mean annual temperature 46 — 37. 



Native. Ericetal. Mr. J. T. Syme estimates the lower 

 altitudes at which he has found this species, at about 200 

 yards in Hoy, and at 50 yards in the Isle of Mull. It has 

 been before remarked in this work (vol. i. p. 60) that all 

 the species of Orkney, not extending to Shetland, are 

 considered to cease between the lines of 59 and 60 north 

 latitude, as the ready mode of separating those that attain 

 to Orkney, from those that cease in Sutherland or Caith- 

 ness. But as some of the Orkney plants, especially the 

 few mountain species found only on Hoy Hill, may not 

 pass the line of 59, this indication of the higher latitude 

 may in some instances be mathematically erroneous. Ly- 

 copodium annotinum is a species likely to be thus carried 

 one degree too far northward ; being at present known 

 only on Hoy, although it may possibly occur on some of 

 the more northerly islets of Orkney. 



1414. Lycopodium inundatum, Linn. 



Area 1 2 3 4 5 * * 8 9 10 * 12 * * 15 16 17. 

 South limit in Cornwall, Dorset, Sussex, Kent. 

 North limit in Ross, Moray, Forfar ? Perth ? 

 Estimate of i^rovinces 12. Estimate of counties 40. 

 Latitude 50 — 58. British (?) type of distribution. 

 Agrarian region. Inferagrarian — Sui)eragrarian zones. 

 Descends to the coast level, in the Peninsula ? 

 Ascends to 200 yards, or upwards, in England. 

 Range of mean annual temperature 51 — 46. 



