678 Proceedings of the Royal Irish Academy. 



\ Chrysanthemum segetum (Linn.) — Sparingly in the same field as 

 Sherardia arvensis. 



Matricaria inodora (Linn.) — Very abundant. 

 '■''Artemisia alsinthium (Linn.) — Established in the neighbourliood of 

 two or three cottages. Much used "for the stomach" by the 

 Irish peasantry, and introduced from the mainland. This plant 

 is not native on the east coast of Ireland. 



Filago germanica (Linn.) — Sparingly on banks above the sea in two 

 or three places on the north side. 



Senecio vulgaris (Linn.) — Frequent. 



S.jacohcea (Linn.) — Frequent. 



Inula crithmoides (Linn.) — Common on most of the coast, except the 

 northern side. 



I. ^nilicaria (Liira.) — In damp places ; frequent. 



Bellis 2^erennis (Linn.) — Frequent. 



Aster tripolium (Linn.) — Only at the south-west side of the island. 



Tussilago farfara (Linn.)— In several places. 



Eupatorium cannahinum (Linn.) — Gillap on the north, and near the 

 seal-hole on the south-east side. 

 flapsana communis (Linn.) — Cultivated ground only. 



Hypochceris radicata (Linn.) — Common. 



Leontodon hirtus (Linn.) — By the shore on the south side and south- 

 west side of island. 



I. autumnalis (Linn.) — Common. 



Taraxacum officinale (Wigg.) — South and west side of island. 



Sonchus oleraceus (Linn.) ] -p j. o • • *• 



o . /TT li! \ ( l!requent; o. arvensis grows m a native 



a' ■ /T- \ i situation on the south-west shore, 



o. arvensis (Lmn.) J 



Hieracium pilosella (Linn.) — Common. 



Campanulace^. 



Jasione montana (Linn.) — Rocky ground at Gillap ; scarce. 

 Campanula rotundifoUa (Linn.) — Frequent. 



Eeicace^. 



Erica cinerea (Linn.) — Common. 



Calluna vulgaris (Salist.) — Common. 

 JS'oTE. — Erica tetralix, which is not upon Lambay, requires a 

 moister climate and a greater extent of mountainous country than 

 the above species; it is, certainly, more local on the cast side of 

 Ireland than is generally supposed. Its absence from Howth is 

 remarkable, and I have recently observed that it is either rare or quite 

 wanting on the Knockmeledown and Cummeragh Mountains in the 

 County Waterford. I spent a day upon each of these groups without 

 meeting with it. Again, along the mountainous coast of Waterford, 

 from Tramore to Youghal, where the other species are abundant, 

 E. tetralix does not occur ; whereas in similar situations in the north 

 or west of Ireland it would, undoubtedly, be present. It is common, 

 however, on the Wicklow and Dublin Mountains. 



