1 RANUNCULACE.E. 73 



mited range in every respect, of area, of altitude, of tem- 

 peratui'e ; also to be of less frequent occun-ence within its 

 more limited space. Localities were published for this plant 

 in the provinces of Channel and Thames, on the authority 

 of Dr. Maton and Rev. H. Davies ; but there seems good 

 reason to presume that T. flavum must have been mistaken 

 for the present species. Individually, I cannot form any 

 satisfactory conclusion as to whether this is, or is not, spe- 

 cifically distinct from T. minus. 



4. Thalictrum flavum, Linn. 



Ai-ea 1 2 3 4 5 I 7 8 9 10 11 *^13 14 15 ^ [17]. ^ ^^- /h]' /x- J/«^. 



South limit in Devon, Isle of Wight, Kent. 



North limit in Fifeshire and " Banks of the Clyde." 



Estimate of provinces 15, Estimate of counties 50. 



Latitude 50 — 57. English type of distribution. 



Agraiian region. Inferagrarian — Midagi-arian zones. 



Descends to the coast level, in the Channel. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperatm-e 51 — 47. 



Native. Paludal. Though finding no reported locality 

 for the provinces of South Wales and the Lakes, I have 

 supposed the species more likely to occm- there, than to be 

 quite absent ; and have so estimated its census by provinces 

 at 15, instead of the ascertained number of 13 only. Per- 

 haps, the West Highlands might also have been added to 

 the number. The locality of " Sandside, Caithness," pub- 

 Ushed on the authority of Mr. Torrie, should doubtless have 

 been given for T. minus, which I have myself observed 

 there. I am unaware of any locality higher than the Willow 

 island, near Settle, where this species was seen by Mr. 

 Tatham ; and more by guess, than knowledge of fact, I 



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