16. HYPEEICACE^. 249 



afford an additional reason ; but the plants of that county, 

 on the authority of Mr. Gordon, were probably observed 

 near the eastern coast line, the temperature of which is as- 

 sumed to be 47 in the estimates for this work. But while 

 the mean annual temperature may possibly be higher on 

 the east coast of Ross, that of summer is probably higher 

 at Callander. 



218. Hypericum humifusum, Linn. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16. 



South limit in Cornwall, Isle of Wight, Kent. 



North hmit in Moray and extreme north of Argj'le. 



Estimate of provances 16. Estimate of counties 75. 



Latitude 50 — 58. British type of distribution. 



Agrarian region. Inferagi'aiian — -Superagi'aiian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 150 yards, in the East Highlands. 



Range of mean annual temperatm-e 52 — 46. 



Native. Pascual. Frequent in England, particularly in 

 the southern counties ; less so in Scotland, but said to be 

 common even so far north as in Moray. On this account 

 I venture to include the North Highland province in the 

 estimated census, on the probability that a species which 

 is common in Moray, will occur also in the east of Ross- 

 shire. 



219. Hypericum linearifolium, Vahl. 



Area 1. 



South and North limits in Cornwall and Devon. 

 Estimate of provinces 1. Estimate of counties 2. 



2 K 



