462 76. LILIACE^. 



Latitude 53—54. Local type of distribution. 



Arctic region. Inferarctic zone. 



Descends to 700 yards, less or more ? 



Ascends to 800 yards, less or more ? 



Range of mean annual temperature, say 41 — 40. 



Native. Rupestral. Very local ; being limited to the 

 Snowdonian range of mountains, in Caernarvonshire ; nor 

 is it clear that it now exists in more than one spot, the 

 chasm of Twll ddu, which I roughly estimate at some 700 

 yards of elevation, without knowing the precise locality of 

 the plant. 



1095* SiMETHIS BICOLOE, Kunlh. 



Area * 2. 



South limit in Dorset. 



North limit in the same county. 



Estimate of provinces I. Estimate of counties L 



Latitude 50 — 51. Local (Atl.) type of distribution. 



Agrarian region. Inferagrarian zone. 



Descends to ? 



Ascends to .'' (Near the coast level.) 



Range of mean annual temperature, say 51. 



Native? Ericetal. Extremely local ; having been dis- 

 covered by Miss Charlotte Wilkins, in 1847, growing in 

 small quantity, about two miles distant from Bourne, on 

 what was once part of Poole Heath, but is now a planta- 

 tion of firs, chiefly of Pinus maritima (E. B. S. 2952; 

 Phytologist, iii. 260). There would seem to be no grounds 

 for supposing it an introduced plant, and none to be ad- 

 duced against its probable nativity, except the very restricted 

 space occupied by it, at least so far as hitherto ascertained. 

 The presumption in favour of its English nativity is 



