296 88. PTERIDIOIDES. 



but as the altitude of the station at Dunkery Beacon, ac- 

 cording to a label sent with a sijecimen of the j)lant 

 kindly given to me by the Eev. W. H. Coleman, is 1668 

 feet above the sea, it may be held still in the sui^eragra- 

 rian zone for a descending sj)ecies ; although an austral 

 and ascending jplant, attaining onlj^ to that altitude in a 

 southern and not mountainous i)rovince, might scarcely 

 be deemed to exceed the midagrarian zone. The most 

 southern point at which this species descends to the coast 

 level, is not known to me. In the Flora Abredonensis 

 two stations are given which may be thus low : — " At the 

 corner of the fir wood near New Church of Nigg ; and 

 near Bay of Nigg." But under L. Selago, in the same 

 Flora, is the locality of " Hills at Nigg," &c. ; and thus, 

 it seems not unlikelj'- that L. alpinum may there be on a 

 hill and i^ossibly at an elevatian too liigh to be designated 

 " coast level." The Eev. W. A. Leighton marks the name 

 of this species among plants reported to occur in Shrop- 

 shire, but not seen hi the county by himself ; and I know 

 not the authority. Mr. Newman has seen specimens of L. 

 Selago, from that county, mislabelled L. alpinum. 



1416. Lycopodium Selago, Linn. 



Area general. 



South limit in Cornwall, Dorset, Hants, Sussex. 

 North limit in Shetland, Orkney, Hebrides. 

 Estimate of i^rovinces 18. Estimate of cou.nties 70. 

 Latitude 60 — 61. British type of distribution. 

 A. A. regions. Inferagrarian — Superarctic zones. 

 Descends nearly to the coast level, in Ouse. 

 Ascends to 1440 yards, in East Highlands. 

 Range of mean annual temperature 48 — 32. 



