344 24. ROSACEA. 



330. POTENTILLA ALPESTRIS, Hal. Jll. 



" PoTENTiLLA Salisburgensis, Jacqr (Br. Fl.) 



Area *i^**.;,j6***1011 12^*15. 



South limit in Cardiganshire ? Brecknockshire? Yorkshire, 



North hmit in Aberdeenshire, Perthshu-e, Westmoreland. 



Estimate of provinces 5. Estimate of counties 10. 



Latitude 52 — 57. Highland type of distribution. 



A. A. regions. Superagrarian — Midarctic zones. 



Descends to, say 300 or 200 yards, in Wales & Yorkshire. 



Ascends to 850 or 900 yards, in the East Highlands. 



Range of mean annual temperature 46 — 37. 



Native. Rupestral. Probability, rather than certainty, 

 induces me to include South Wales within the area and 

 ranges of this species. On the authority of the English 

 Flora, it grows in Cardiganshire. I have a specimen from 

 the Botanical Society of London, which appears properly 

 refenible to this species, although labelled " Tormentilla 

 officinalis ; " and which is located from " Glyn Neath, Bre- 

 conshke," apparently in the hand-writing of Mr. Lees, 

 whose name is given as that of the contributor of the spe- 

 cimen to the Society. The decidedly higher provincial 

 census of this species in England, as compared with its 

 limitation to a single Highland province, is an anomaly, of 

 which a somewhat similar instance occurs in Thlaspi al- 

 pestre. It is probable, however, that the distribution of 

 P. verna and P. alpestris should be taken as that of one 

 species only; and in this case their anomalies would be 

 much lessened, although not wholly removed. 



