232 Proceedings of the Royal Iri-^h Academy. 



omitted the re-enumeration of those ubiquitous lowland species which 

 ascend to the summit of all mountain ranges in Ireland. 



These mountains did not seem entitled to any very detailed exami- 

 nation, and I did not do much more than satisfy myself with regard 

 to their alpine flora, and the range of the more constantly limited 

 species, as well as note unusual occurrences. The scarcity or absence 

 of Erica tctralix is noteworthy. 



The alpine species are — 



Sedum rhocUola, Salix herhacea, 



Saxifraga stellar is, Car ex rigida, 



Hier actum anglicum, Isoetes lacustris. 

 Vaccinium vitis idcea, 



Of "Watson's northern type are — 



Saxifraga sponJieimica, Empetrum nigrum, 



Crepis pcdudosa, Listera cordata ; 



Finguicida vidgaris, 



while Saxifraga umirosa finds here its most eastern British station. 

 Most of these have not been recorded from the mountains of this 

 county before. Hieracium anglicum, Listera cordata, Carex rigida, and 

 Isoetes lacustris are new to the district. 



Table of heights to which mountain plants ascend on the Knock- 

 meildown and Commeragh mountains, county Waterford, arranged in 

 descending order. 



Knockmeildown mountain, 2600 feet. 



Saxifraga umhrosa, Linn. To 2080 feet ; on Commeraghs from 2200 

 to 1100 feet below Coumshingaun Lough, and 500 feet east of 

 Coumduala Lough. 



The same, 2530 feet. 



Saxifraga sponheimica, Gm. To 2450 feet ; on Commeraghs from 

 1200 to 1100 feet below Coumshingaun Lake. 



Campanula rotundifolia, Linn. 



Scdix Iwlacea, Linn. Scarce here ; abundant on Commeraghs, espe- 

 cially on cliffs looking north around the southern skirts of the 

 Stilloge coom, at 2100 feet; 2050 feet above Coumshingaun 

 Lough. 



Poa annua, Linn. 



Symenoplujllum unilaterale, Willd. To about 2000 feet ; on the 

 Commeraghs more common, 2150 to 1000 feet below Coum- 

 shingaun Lough. 



The same, 2450 feet. 



Empetrum nigrum, Linn. To 2000 feet west of Bay Lough ; 2150 in 

 Commeraghs above Stilloge Lakes, and 2300 above Coumshingaun 

 Lake. 



