238 Proceedings of tlie Royal Irish Academy. 



Blackstairs, 1100 feet. 



Scilla nutans, Sm. West side. 



Zastrmi oreopteris, Presl. At 500 feet on Mount Leinster. 



The same, 1000 feet. 



Ranunculus hederaceus, Linn. West side. 

 Erica tetrcdix, Linn. ,, 



Myosotis ccespitosa, Sch. ,, 



Blackstairs, 850 feet. 



jEleocharis m.ulticaulis, Sm. On the west side to 600 feet ; also on 

 north of Mount Leinster at 550 feet ; a scarce plant in the east 

 of Ireland. 



The same, 700 feet. 



Brosera rotundifolia, Linn. 



Mount Leinster, 500 feet. 



U.yperictim elodes, Linn. At North-east base. 

 Lotus major, Scop. ,, 



Car ex Icevigata, Sm. ,, 



Between Borris and the base of Blackstairs I observed the following 

 rather local species : — Erigeron acris, Linaria minor, Stachys arvenis, 

 Linaria vulgaris, LastrtBa oreopteris, and Scutellaria minor. White 

 foxglove was met with. Along the railway I noted Equisetum maxi- 

 mum, and Lychnis vespertina ; near Goresbridge, and in a large bog near 

 Milford, Carex riparia. 



IV. 



In July, 1883, I spent a few days amongst the Mourne Mountains, 

 and made also an excursion over the Carlingford Hills. These moun- 

 tains are almost entirely formed of granite, and their rounded slopes, 

 devoid of considerable cliils and frequently devoid also of soil and 

 moisture, are unfavourable for the growth of plants. Although inter- 

 sected by an arm of the sea, the Carlingford Hills are geologically 

 and botanically a continuation of the Mourne Mountains. 



The Mourne Mountains cover an elliptic area, lying north-east and 

 south-west, of about 15 miles by 6. Several summits rise in isolated 

 hummocky masses throughout the region, of which Slieve Donard 

 (2796), Siieve Commedagh (2512), and Slieve Bingian (2449), are the 

 highest, and lie to the north-east end of the range. The range lies 

 in lat. 54° 2' to 54° 14', and W. long. 5° 51' to 6° 7'. Considering 

 their position and height, they are remarkable for the scarcity of 

 alpine and mountain plants occurring. By the Amialong river several 



