23. LEGUMINOS.E. 329 



Descends to the coast level, in the Peninsula. 



Ascends to 700 yards, in the East Highlands. 



Range of mean annual temperature 51 — 40. 



Native. Sylvestral. Omitted from the Floras of Yar- 

 mouth and Cambridge, and from several local lists of a less 

 complete character ; as also from the Catalogue of plants 

 observed in the Hebrides, by Balfour and Babingtou. It 

 may happen that the census would be more true at 75 

 than at 80 ; but I cannot select half a dozen counties, from 

 which this plant appears likely to be quite absent. Vari- 

 ations in the breadth of the leaves are so frequent with 

 many other allied leguminous plants, that the O. tenuifolius 

 appears scarce worth distinction as a named variety, and 

 much less as a species. 



313. OrOBUS NIGER, L. 



Area ^ ^ -^ ^ [5] ^^*^^jj;^j(f^ 15. 



South and North limits in Perthshire and Forfarshire. 



Estimate of provinces 1. Estimate of counties 2. 



Latitude 56 — 57. Local or Scottish type of distribution. 



Agrarian region. Superagi'arian zone. 



Descends ? Ascends .'' (Say, 100 — 200 yards). 



Range of mean annual temperature (45?) 



Native ? Sylvestral. Discovered by Mr. Thomas Drum- 

 mond, in the Den of Airly, twelve miles westward of For- 

 far, near or within the coimty of Perth ; and more lately 

 seen by Mr. Gorrie, " in the Pass of Killicrankie, scattered 

 over a piece of ground in the coppice wood, at least twenty 

 yards across, and far removed from any cultivated ground." 

 (Trans. Bot. Soc. Edinb.) The very circumscribed area of 

 the locality seems the only circumstance of suspicion 

 against the nativity of the species in Scotland. More 



2 u 



