80 1 RANUNCULACE^. 



13. Ranunculus hederaceus, Linn. 



Area, general. 

 C^nt^fJi South limit in Devon, Isle of Wight, K,ent. 

 ^ ^''^■"1 North limit in Sutherland and Isle of Lewis. 

 -*'•/"' Estimate of pro\'inces 18. Estimate of counties 80. 



Latitude 50 — 59. British type of disti-ibution. 



A. A. regions. Inferagrarian — Inferarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends neai-ly to 800 yards, in North Wales. 



Range of mean anbual temperature, 51 — 41. 



Native. Lacustral. Distributed throughout Britain, 

 unless the Orkney and Shetland Islands be exceptions to 

 its generality. In the Highland provinces, it has not been 

 observed higher than R. aquatihs ; but on Camedd David, 

 in Caernart^onshhe, I saw it so high as 2350 feet ; and in 

 accordance with this elevated locality, the species is here 

 assigned to .the lowest zone of the arctic region, and a lower 

 temperatm-e indicated for it than for the allied species, R. 

 aquatilis. We have here an example of the latitude neces- 

 saiy in applying the teims which denote the local situations 

 of species. "When in water, the present is a floating spe- 

 cies, like R. aquatilis, and comes best uuder my definition 

 of " Lacustrals ;" but it grows out of water so frequently, as 

 to be almost as well placed among the "Paludals" or "In- 

 undatals." 



13,b. Ranuncjjlus Lenormandi, Sclmltz. 



Ai-ea 1 I 3 * 5 1 4 8 9''^ * 12. /^ 

 South limit in ? 



