340 



ISLAND LIFE. 



[I'ART II. 



Two other species are, so far as the European Flora is con- 

 cerned, peculiar to Britain, being natives of North America, 

 and they are very interesting because they are certainly both 

 truly indigenous, that is, not introduced by human agency. These 

 are, — (1) Spirantlies romanzoviana, an, orchid allied to our 

 ladies' tresses, widely distributed in North America, but only 

 found elsewhere in the extreme south-west corner of Ireland ; 

 and (2) Erioccvidon septangulare — the pipewort — a curious 

 North American water-plant, found in lakes in the Hebrides and 

 the west of Ireland. Along with these we may perhaps class 

 the beautiful Irish filmy fern — Tricliomanes radicans, which 

 inhabits the Azores, Madeira and Canary Islands, the south- 

 west of Ireland, Wales, and formerly Yorkshire, but is not 

 certainly known to occur in any part of continental Europe 

 (except perhaps the south-west of Spain), though found in many 

 tropical countries. 



We may here notice the interesting fact that Ireland possesses 

 no less than twenty species or sub-species of flowering plants not 

 found in Britain, and some of these mcuj be altogether peculiar. 

 As a whole they show the effect of the pre-eminently mild and 

 insular climate of Ireland in extending the range of some south 

 European species. The following lists of these plants, with a 

 few remarks on their distribution, will be found interesting : — 



List of Irish Flowering Plants which are not found in Britain. 



1. Helianthemum guttatum. Ireland, near Cork, and on an island off 



the coast of Gralway (also Channel Islands, France, Italy). 



2. Arenana ciliata. S. W. Ireland (also Auvergne, Pyrenees, Crete). A 



variety of this species has been recently found in Pembrokeshire. 



3. Saxifraga umhrosa. W. Ireland (also N. Spain, Portugal). 



4. „ geu?n. S. W. Ireland (also Pyrenees). 



5. hirsuta. S. W. Ireland (also Pyrenees). 



6. Saxifmga hirta (liypnoides sub. sp.). S. Ireland, apparently unknown 



on the continent. 



7. Inula salicina. W. Ireland (Middle and South Europe). 



8. Erica mediterranea. W. Ireland (W. France, Spain, Mediterranean). 



9. „ mackiana {tetralix sub.-sp.) W. Ireland (Spain). 



10. Arbutus unedo. S. W. Ireland (S. of France and Spain). 



11. Daheocia pol^folia. W. Ireland (W. of France and Spain). 



12. Pingiucula gmndiflora. S. W. Ireland (W. of France, Spain, Alps, &c.). 



13. Neotinea Intacta. W. Ireland (France, S. Europe). 



