10 -t Proceedings of the Royal Irish Academy. 



Lastrea aernula, Osmunda regalis, have penetrated, mostly in abundance, to all 

 these outposts, the alpine species descending in all cases to close upon 

 sea-leveL 



On the other hand, the next stations of Saxifraga Geum and S, dedpiens are 

 in Kerry ; of Silene acaulis inSligo; of Helianihemum guttatum and Hieracium 

 hypoclmeroides in Cork ; of Ceratophyllvm demersum in Westmeath and Clare ; 

 of Galamagrostis Epigejos in the Aran Islands in Gal way Bay ; and of EwpJwrhia 

 hiberna on Slieve Aughty in S.E. Galway. Lychnis diurna, found sparingly on 

 Inishturk and Clare Island, has its next station on Lough Mask ; Trifolium 

 arvense is on the whole west coast of Ireland found only on Inishturk and on 

 one of the Aran Islands. 



Analytical Notes. — Of some 370 species which are known to grow, or 

 which probably grow, in all the forty Irish botanical divisions, about 300 are 

 present on Clare Island — in other words, about 80 per cent, of the Clare 

 Island flora is made up of " Universal " plants. The same comparison within 

 the flora of the whole of West Mayo would give 60 per cent, of Universal 

 plants for that division ; or within the Irish flora approximately 30 per cent. 

 In Connacian type plants Clare Island is remarkably poor — a feature which it 

 shares with Inishbofin, as will be seen later. Of 63 Connacian species listed 

 in my paper on Types of Distribution, 1 only five (Saxifraga v.mbrosa, Erica-, 

 mediterranea, Oxyria digyna, Juniperus nana, and Asplenium viride) occur on the 

 island. As to the other types, the only Ultonian plants are Silene acaulis and 

 Saxifraga opjyositifolia ; the only characteristically Mumonian, Saxifraga Geum ; 

 Lagenian type is not represented, save by Carecc dioica, of which recent exten- 

 sions of range suggest removal from that type. Of Marginal plants, 18 out 

 of 46 are present ; of Central plants, only one (Juncus obtusiflurus) out of 38. 



One would expect the flora of Clare Island to be thoroughly calcifuge, and 

 such is found to be the case. Taking the " Cybele Hibernica " standard, we find 

 that of 56 species classed as calcieole, only 8, or 14 per cent., occur. These are 5 

 "calcicoleB" plants (namely, Anthyllis Vulneraria, Tussilago Farfara, Wardmis 

 nutans, Leontodon hirtus, Garex glaucd) and three " calcieole C " plants 

 (Antennaria dioica, Pvlicaria dysenterica, and Convolvulus arvensis). On the 

 other hand, of 75 species classed as calcifuge, 59, or over 78 per cent., are 

 found on the island. 



1 R. LI. Praegek: On types of distribution in the Irish Flora. Proc. R.I. Acad., xxir, Sect. B, 

 pp. 1-60. 1902. 



