THE SUBDIVISION OF lEELAND Ixi 



occurrence of many East Coast species. The mountain flora is 

 singularly poor, considering the elevation of the hills. THfolium 

 siihterraneum and Nitella gracilis are not known elsewhere in Ireland. 

 Hare or characteristic plants are numerous : — 



Corydalis claviculata, 5. Lamiuiu Galeobdolon, 3. 



Viola lutea, 5. Scilla verna, 6. 



Trigonella ornitlaopodioicles, o. Juncus acutus, 4. 



Trifolium subterraneum, 1. Scirpus parvulus, 2. 



Trifolium scabrum, 4. Festuca viniglumis, 5. 



Trifolium glomeratum, 2. Polypodium Dryopteris, 4. 



Alchemilla alpina, 2. Equisetum Moorei, 2. 



Senecio erucifolius, 5. Nitella gracilis, 1. 

 Orobanche major, 5. 



21. Dublin. 



Eastern. Area 354 square miles — one of the smallest Irish 

 counties. Maritime, with a diversified shore-line, and several 

 islands. In the south, the northern slopes of the Leinster high- 

 lands belong to this county, forming granite hills that rise to 2473 

 feet in Kippure, on the Wicklow boundary. The remainder of the 

 county is chiefly low-lying limestone, broken through in places by 

 rugged masses of older rocks of Cambrian, Old Eed, and Silurian age, 

 which form the bold promontory of Howth, the cliff-bound island 

 of Lambay, and other conspicuous features. The waters of the 

 county consist of the Kiver Liffey, which crosses from the west to 

 enter the sea at Dublin, find the Grand and Eoyal Canals, the 

 courses of which are parallel to it. There are no lakes, and no low- 

 level bogs. A single esker-ridge occurs SW. of Dublin ; other gravels 

 of Glacial age are frequent. A low-lying county, with 62 per cent, 

 of the surface below 250 feet elevation, and 86 per cent, below 

 500 feet. Grass land covers 55 per cent., crops 30 per cent. 

 Already well explored, the county has been recently surveyed in 

 detail by Mr. Colgan, who has supplied me with exceedingly full 

 lists of the flora. 



Flora 750 species — a total exceeded in Co. Antrim only. The 

 East Coast group is well represented ; mountain and bog plants are 

 necessarily very few. Four plants are confined to the county : — 

 Sisymbrium Irio, Medicago sglvestris, Tolypella prolifera, Tolypella 

 intricata. 



