346 24. ROSACE^.. 



North limit in Shetland, Orkney, Hebrides. 



Estimate of pro^'inces 18. Estimate of counties 82. 



Latitude 50 — 61. British type of distribution. 



A. A. regions. Inferagi-ai-ian — Superarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to UOO yards, or upwards, in East Highlands. 



Range of mean annual temperatm-e 52 — 36. 



Native. Ericetal, Pascual, &c. One of the most gene- 

 rally distributed and abundant of British plants ; and thus 

 pre-eminently belonging to the British type of distribution. 

 Potentilla nemoralis (Tormentilla reptans, Linn.) is quite 

 one of our botanical opprobria. I have examined many 

 examples in this country and in the Azores, and have had 

 it in cultivation in my garden for some years past ; and 

 still I feel quite uncertain about it. For the present, my 

 opinion remains much the same in respect to P. nemoralis, 

 with that before expressed concerning Geiun interaiedium ; 

 namely, that varieties of two species (P. reptans and P. 

 Toi-mentilla) are clubbed together to make up the P. nemo- 

 ralis. But there is still a difficulty under this vievf, for 

 some examples appear so precisely intennediate, that I 

 know not whether to place them as varieties of P. reptans, 

 or as varieties of P. Toi-mentilla. In one form or other, 

 plants to which botanists would usually give the name of 

 Potentilla nemoralis (or Tormentilla reptans) occiu" in al- 

 most or quite everj' province. But I suspect that it is more 

 frequently represented by varieties of Potentilla reptans 

 than by those of Potentilla Tonnentilla. 



333. Potentilla Fragariastrdm, Ehrh. '^/V-/'/./'* 



Area 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 17. 



South limit in Cornwall, Isle of Wight, Kent. 



