THE SUBDIVISION OF IRELAND Ixix 



Even tlie Leitrim side of the Ben Bulben range is not yet fully 

 known. 



Flora 533 species. The alpine plants of Ben Bulben form, as 

 in Sligo, the most interesting feature. One of these — Ejnlobium 

 alsinefolium — has here its only Irish station. 



Eare and characteristic plants : — 



Fumaria densiflora, 4. Eupkrasia Salisburgensis, 6. 



Arabis petrsea, 2. Teucrium Scordium, 7. 



Silene acauKs, 4. Polygonum mite, 4. 



Saxifraga aizoides, 5. Adiantum Capillus-Veneris, 6. 



Epilobium alsinefolium, 1. Aspidium Lonchitis, 6. 



Galium sylvestre, 6. Polypodium Dryopteris, 4. 



30. Cavan. 



North-central. Area 746 square miles. Inland. The eastern 

 half is formed of Silurian grits, much covered with drift. The 

 surface here is undulating and largely tilled ; it rises in Slieve Glah 

 to 1057 feet, but this is quite an isolated hill. In the south it 

 embosoms some large lakes (Lough Sheelin and Lough Eamor), and 

 a multitude of small lakes are scattered over the county. Along 

 the basin of the Erne, which flows northward across the centre 

 through a maze of lake-like windings of marvellous intricacy, 

 there is a good deal of Carboniferous limestone, the solution of 

 which has produced the remarkable river-features just referred to. 

 The long north-western arm of the county is occupied by higher 

 grounds formed of limestone. Coal-measures, and Carboniferous 

 sandstones, attaining to an elevation of 2188 feet in Cuilcagh. 

 Here the Shannon has its source. Extensive low-level bogs occur, 

 but very locally. The great eskers of the Central Plain have been 

 left behind, in more southern latitudes. There is plenty of marsh 

 along the Erne and around the innumerable lakelets. A fertile 

 county, 56 per cent, being under grass, and 28 per cent, under 

 crops. Peat bog is only 3 per cent., and mountain land the same. 

 The flora of the centre and north-west has been tolerably well 

 worked out ; the south and east are as yet almost unknown, and 

 the list of the flora is still quite incomplete. 



Flora 500 species : as at present known, without any special 



