88. PTERIDIOIDES. 293 



1412. Lycopodium clavatum, Linn. 



Ai-ea general. 



South limit in Devon, Dorset, Hants, Sussex. 



North limit in Orkney. :=fShetland4r 



Estimate of j)rovinces 18. Estimate of counties 60. 



Latitude 50— 60. British type of distribution. 



A. A. regions. Inferagrarian — Inferarctic zones. 



Descends to 50 yards, less or more, in Thames. 



Ascends to 650 yards, in East Highlands. 



Range of mean annual temperature 49 — 41. 



Native. Ericetal. Too widely distributed to be as- 

 signed to the Scottish type, in preference to the British ; 

 but apjproximating to the former by its greater frequency 

 on the ericetal and pascual declivities of the northern and 

 mountainous provinces. It ascends but little within the 

 arctic region. According to Mr. Newman (Phytologist i. 

 34) a specimen from Shetland, labelled as L. clavatum by 

 Mr. Edmondston, was truly L. alpinum ; and this early 

 error on the part of Mr. Edmondston is virtually admitted 

 by himself, in the omission of L. clavatum from his pub- 

 lished Flora of Shetland ; although I do not know that 

 he had a sufficient love of scientific accuracy, expressly 

 to point out and correct this error of his first list. 



J t J- 1413. Lycopodium annotinum, Linn. 



Area * * * ^^ * * 7 * 4 -:). * 12 * ^^ 15 16 17 18. 



S. limit in Caernarvon, Cumberland or Westmoreland. 



North limit in Orkney. 



Estimate of provinces 6. Estimate of counties 12. 



