11 



HEPATIC.^ OF WICKLOW. 

 By David McArdle. 



In the latter part of 1887 and in the present year I paid four 

 visits to Altadore Glen, Co. Wicklow, in search of Hepaticce. The 

 distance from Bray is about nine miles ; the route is through the 

 most beautiful and picturesque part of the county. It is a pretty, 

 wooded glen, divided by a stream on which are several cascades on 

 the wet rocks ; at one we gathered the rare Dumortiera, which 

 grows luxuriantly, and on the trunks of decayed trees and on moist 

 stones Lejeunea jiava Swartz is plentiful. The occurrence of these 

 two plants, which have such an interesting geographical distri- 

 bution, is a true indication of the genial moist atmosphere they 

 enjoy, similar to that in which they are found in South America 

 and in Java, and which makes many parts of Ireland so rich in 

 this interesting family of plants. 



The appended list is provisional only, and is by no means 

 intended as complete. The principal object in writing it is with 

 the hope that some person interested in Liverworts and other 

 Cryptogams may be induced to visit that interesting part of the 

 Co. Wicklow. * indicates an addition to the Flora of the district. 



Marchantia polymorpha L. ; Eng. Bot. t. 100. 

 Dumortiera irrigua Nees. 

 Lunularia cruciata L., Dumort. 



Frullania HutchinsicB Hook. ; Hook. Brit. Jung. t. 1 ; Eng. Bot. 

 t. 2480. 



F. dilatata L. ; Dumort. ; Hook. Brit. Jung. t. 8. 

 Lejeunea serpyllifolia (Mich., Dicks.), Libert. 

 *L. patens Lindberg ; Moore, Irish Hepat. pi. 48. 

 L. serpyllifolia var. ovata Nees. 



,, var. translucida Spruce MSS. 



*L. ftava Swartz. 

 L. Moorei Lindberg ; Moore, Irish Hepat. pi. 44. 

 Radula complanata L., Dumort. ; Hook. Brit. Jung. t. 81. 

 Cephalozia bicuspidata L., Hook. Brit. Jung. t. 11. 

 *C curvifolia Dicks., Dumort. ; Hook. Brit. Jung. t. 16. 

 *C. connivens Dicks., Hook. Brit. Jung. t. 15. 



Lophocolea bidentata L., Dumort. ; Hook. Brit. Jung. t. 80. 

 *L. heterophylla Schrad. ; Hook. Brit. Jung. t. 31. Although I 

 have followed many good authorities in placing this in the rank of 

 a species, we find it approximates so closely to the foregoing that 

 it is difficult sometimes to separate one from the other. It is un- 

 common in Ireland ; reported from the south and west. I have 

 not gathered it before. 



L. spicata Taylor; Cooke, Brit. Hepat. p. 15, pi. 118. One of 

 the most beautiful of the genus, and a scarce plant in Britain. It 

 was collected in the same glen by the late Dr. Moore in 1873. 

 I found it in patches on the trunks of trees which have fallen and 

 decayed, not mixed with any other species of liverwort, as it is 

 generally found in other localities. 



