85. CYPERACE^. 105 



a lower temperature by fully two degrees, than is above 

 indicated for it. 



1221. Carex divulsa, Good. 



Area 1 2 3 4 5 * 7 8 * 10 11 * [13 14]. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Durham ? York, Denbigh. 



Estimate of provinces 10. Estimate of counties 30. 



Latitude 50 — 55. English tj^pe of distribution. 



Agi'arian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 51 — 47. 



Native. Septal, Sj'lvestral, &c. Marked in the Edin- 

 burgh Catalogue, as very rare within 16 miles of that city, 

 which is the authority for province 14 in the line of area ; 

 but whether the county of Edinburgh, or even the south 

 side of the Forth, be intended by the record, I am unable 

 to say. According to Mr. David Don (Hook. Scot.) it 

 grows on the rock below Cathcaii; Castle, in the neigh- 

 boui'hood of Glasgow ; but whether this station is rightly 

 referred above [13] to the south side of the river Clyde, I 

 am also not certain. C. divulsa and C. muricata are so 

 difficult to distinguish in some cases, that I prefer to await 

 further confirmation before taking either of these two 

 alleged Scottish habitats into the true area of a species, 

 otherwise limited to England, and not yet ascertained in 

 its most northerly counties. One suspicious locality is 

 recorded in Durham, — suspicious because the same ha- 

 bitat appears to be referred to C. muricata by another 

 authority. (See Winch, Flo. N. D. p. 59). 



VOL. ni. p 



