18 



Froceedi/igs of the Royal Irhh Aca/hmy. 



Calcieole B. 



Aquilegia vulgans. 

 Eeseda Luteola. 

 Hyperieuin perforatam. 

 Anthyllis Yulneraria. 

 Poterium Sanguisorba. 

 Pimpinelia Saxifraga. 



magna. 

 Eubia peregrina. 

 Galium boreale. 

 Asperula cynanchica. 

 Erigeron acre. 

 Tussilago Farfara. 

 Carduus nutans. 

 Centaurea Scabiosa, 

 Crepis taraxacifolia. 

 Leontodon hirtus. 



Leontodon hispid as. 

 CMora perfoliate. 

 Gentiana Amarella. 

 Lithospermum officinale. 

 Yerbascum Thapsus. 

 SalTia Yerbenaca. 

 Origanum rulgare. 

 Opbiys muscifera. 

 Spiranthes autunmaUs. 

 Juncus glaucus. 

 Carex divulsa. 



glauca. 

 Trisetiim flavescens. 

 Avena pubescens. 

 Adiantum Capillus-Yeneris 

 Ceteracb officinarum. 



Calcieole C. 



Arabis hirsuta. 

 Sisymbrium AlUaria. 

 Yiola hirta. 

 Cerastium arvense. 

 Euonymus europaeus. 

 Antennaria dioica. 



Pulicaria dysenterica. 

 Convolvulus arvensis. 

 Habenaria conopsea. 

 Carex muricata. 

 Festuca rigida. 



Total 53. Our maximum is 50 in Clare, minimum 20 in Tyrone. 

 The map "vrorks out as shown in fig. 10, opposite page. 



The result is somewhat unexpected. The calcieole group has its 

 headquarters, not in the Limestone Plain, but in the west, reaching 

 its maximum in Clare, S.E. Galway, and Limerick. Thence it 

 follows the edge of the limestone northwards, so that although "West 

 Galway has nothing more than a strip of limestone along its eastern 

 edge, this division is high in the scale, along with ZST.E. Galway and 

 E. Mayo. A prevalence of calcieole plants appears also in E. Cork, 

 "Kilkenny, Kildare, and Dublin, none of which occupy the fii'st rank 

 as regards area of limestone. Elsewhere the distribution of the 

 gi'oup is what we should expect : the minimum is reached in Lister, 

 where, on the Silurian area and elsewhere, but few calcieole plants 

 maintain an existence. The reason for the great development of the 

 calcieole group in the west is not far to seek ; it lies in the occurrence 

 of bare limestone pavements in the Burren area, in Limerick, and 

 around the great lakes of Corrib and Mask. It is the presence of 



