Erica] ERIC ACE ^ 207 



31 Louth Ardee bog '97— P. 



37 Armagh Tartaraghan (Gr. Eobinson) — More 6oo. 



38 Down Wolf Island bog ['65], Stewart— i^/. NE. 



Essentially a Central Plain plant, as the census numbers will show, 

 abounding on the red bogs. Becomes rare in the north even in inland 

 divisions, and likewise in the south, 



Calluna vulgaris Salisb. Ling. 

 Divisions all. Common. 



Erica Tetralix L. Cross-leaved Heath ; Bell-Heather. 

 Divisions all. Common. 



Erica Machaii Hooker. 



16 Galw. W. Craigga More '96— P. Carna '74— More 675. One 

 mile from Eoundstone '45 — Ogilby 65J. 



Erica cinerea L. Heather. 

 Divisions all, except 23 JVestmeath, 24- Longford. Locally abundant. 



Pequiring drier ground than Calluna and E. Tetralix^ this species 

 does not often grow on the red bogs, where its allies are so abundant ; 

 and being like them strongly calcifuge, suitable habitats are frequently 

 wanting in the Central Plain, where limestone predominates. E. cinerea 

 generally appears on rough ground as soon as the limestone is left. 

 On limestone mountains, the covering of peat is often suJ0S.ciently 

 thick to allow the plant to grow luxuriantly. There are a few marked 

 exceptions to its calcifuge jDroclivities. In Galway JSTE. the only 

 station (Coolaran) is bare limestone "crags," amid a characteristic 

 calcicole flora ; and in Galway W., near Poss Lake, it is abundant on 

 esker-like ridges formed entirely of limestone gravel and boulders. 

 It also occurs on the Aran Islands, which are mere shelves of lime- 

 stone, devoid of a peaty covering. 



Erica mediterranea L. Mediterranean Heath. 



16 Galw. W. Urrisbeg'96 — P. Kylemore and Salruck, J. MacKinnon 



— Cyh. II. 

 27 Mayo W. Both sides of Lough Conn '00 — P. Locally abundant 



along the coast. 



