418 35. SAXIFRAGACE^. 



but with him the " summits " sometimes mean declivities 

 very far belove, and usually intend the rocks at 700 to 800 

 yards: the actual summits are 1000 yards, or upwards, 

 though there are peaks and ridges of oi>ly 800 or 900 yards. 



434. Chrysosplenium oppositifolidm, Linn. 



Area, general. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Orkney and Sutherland. 



Estimate of provinces 18. Estimate of counties 75. 



Latitude 50 — 60. British type of distribution. 



A. A. regions. Inferagrarian — Superarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 11 00 yards, in the West Highlands. 



Range of mean annual temperature 50 — 36. 



Native. Uliginal, &c. None of our terms, used for ex- 

 pressing the situations of growth, will very exactly apply to 

 those of the present species ; which, indeed, vary consider- 

 ably. The usual haunts are on the damp banks of shaded 

 ditches and small streams, in the agrarian region, and at 

 the mossy efflux of springs on the declivities of the moun- 

 tains, in the arctic region. Doubtful whether 75 or 80 

 would be nearest to a true county census. As it was not 

 observed in the Hebrides, by Balfour and Babington, and 

 is omitted from the Shetland Flora, as also from that of 

 Cambridgeshire, and from several local lists, it may be that 

 75 is not too low for an estimate. According to the London 

 Catalogue, it is mentioned in 18 among 20 local Floras ; 

 the two from which it is absent, being those of Cambridge 

 and Yarmouth. 



