296 23. LEGUMINOS.*. 



Native. Pratal. It is impossible to say where this is a 

 genuine native, or where its present existence may be at- 

 tributed to a former introduction. But wild it now cer- 

 tainly is throughout the agrarian region, and occasionally 

 ascending a short distance up the lower arctic zone. 



272. Tkifolium medium, Linn. 



Area, general. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Shetland, Orkney, Ross. 



Estimate of provinces 18. Estimate of counties 75. 



Latitude 50 — 61. British type of distribution. 



Agrarian region. luferagrarian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 350 yards, in the East Highlands. 



Range of mean annual temperature 51 — 43. 



Native. Rupestral and Pratal. Less common than T. 

 pratense, which it so much resembles that some botanists 

 have supposed it to be the original or wild stock of that 

 species ; and it is doubtless often overlooked through the 

 close similarity. More frequent in the north of England 

 and low tracts of Scotland, decreasing towards the south- 

 ern and northern extremities of the island, and also on the 

 mountains. I think to have seen it at 500 yards, or up- 

 w^ards, in Cumberland ; but this is said only on vague re- 

 collection. 



273. Tkifolium maritimum, Huds. ^ ^'^' ' r'^ 



Areal 23 45*7* *Xi^/// 



South limit in (Cornwall ?), Dorset, Kent. 



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