236 Proceedings of the Royal Irish Acadony, 



Commeraghs, 600 feet. 



Ajxiga rejptans, Linn. By stream out of Coumduala. 

 Lastrcea oreopteris, Presl. ,, 



N.B. — The saxifrages and hawkweeds are easily disposed of here; 

 there is only one of the tufted or S. hypnoides form, i. e. &. apon- 

 lieimica, Gm., to which Mr. Baker refers it. This is the usual plant 

 in the north-east of Ireland, and is not alpine in distribution as the 

 "/w'to" group usually is. S. umhrosa is the form serafolia ; the 

 only hawkweed is H. anglicum. 



III. 



The range of Mount Leinster and the Blackstairs runs north- 

 north-east and south-south-west between the valleys of the Slaney on 

 the east and the Barrow on the west, and forms for some distance the 

 boundary between the counties Wexford and Carlow. It is inter- 

 sected by one principal pass, that of ScuUogue Gap, which separates 

 Mount Leinster on the north from the Blackstairs portion to the 

 south. Mount Leinster is chiefly composed of granite and meta- 

 morphic rocks; and its rounded surfaces, devoid of cliffs and cliff- 

 bound cooms, are quite unsuitable for alpine plants. The highest 

 points reached are 2610 feet on Mount Leinster, and 2409 on Black- 

 stairs. The latter is also formed of metamorphic rocks ; along an 

 outcrop of bleak schist near the summit Vaccinium vitis idcea occurs. 

 This and Carex riyida, which grows also on Mount Leinster, are the 

 only alpine species. Neither have been recorded from these moun- 

 tains before. 



The following are additions to the flora of District 3, as it appears 

 from the Cyhele and its Supplement : — 



Pyrus acuparia, Carex riyida, 



Veronica scutellata, C. Imviyata, 



Vaccinium vitis idcea, C. riparia. 



These mountains are so isolated and have so little upper shelter 

 that the strongest growing species alone prevail above. It is worthy 

 of notice that the two alpine species and a few other mountain plants 

 appear to grow only on the western sides of the summits, as if to 

 escape the east winds from the channel, or perhaps I should say, to 

 benefit by the moister winds from the west. 



Mount Lein&ter, 2600 feet. 



Galium saxatile, Linn. 

 Calluna vulyaris, Salisb. 

 Vaccinium myrtiUus, Linn. 



