248 Froceedings of the Royal Irinh Academy. 



Do. 1500 feet. 



Pyrus aucuparia, Gaert. 



Lathyrus macrorrhi^us, Wimm. 



Lotus corniculatus, Linn. On trap only at this elevation : Ben Evenagh 



at 1100 feet. 

 Gentiana cmnpestris, Jjinn. ,, ,, „ 



Sawel, 1480 feet. 



SoUdayo viryaurea, Linn. 

 Quercus rohur, Linn. 



Benbradagh, 1460 to 1400 feet and lower. 



The following list of plants will show what an effect the warm soil 

 produced by the decomposition of trap rocks has in modifying the 

 severity of climate due to this altitude without shelter. Samples of 

 these occurred higher on the Sawel range, but only casually, not as 

 members of a regularly elevated lowland flora : — 



Ranunculus acris, Anyelica sylvestris, 



R. flammula, Senecio jacohcea, 



Anemone nemorosa, Bellis perennis, 



Cardamine hirsuta, Taraxacum dens leonis, 



Viola sylvatica. Achillea millefolium, 



Sayina procumhens, Veronica serpyllifolia, 



Cerastium triviale, V. chamcedrys, 



Linum catharticum, Rhinanthus crista-yallt, 



Oxalis acetosella, Pedicularis sylvatica, 



Hypericum pidchrum. Primula vulyaris, 



Trifolium repens, Salix repens, 



Vlex europoeus, Plantayo lanceolatus, 



Frayaria vesca, Carex imlyaris, 



Rosa pimpinellifolia, Aira praecox, 



Crataeyus oxyacantha, Triodia decumbens, 



Scahiosa succisa, Asplenium trichomanes. 

 Meracleum. sphondylium, 



Several others have already appeared from a greater elevation on 

 Mullaghmore, and u few species call for remark. 



-Alsine verna, Jacq. And from 1100 on Ben Evenagh to 400 feet at 



Magilligan. 

 Saxifraya hypnoides, Linn. (var. sponheimica). Descends to 1000 feet, 



and from 1150 to 1000 feet on Ben Evenagh. 



Proceeding with the descending list, we shall find the effect of the 

 basaltic soil marked in many instances. 



