ORTEOTRICHACE^. 226 



SERIES II. Order XV. ORTBOTRZCRACEJE. 



ANffiCTAirGZUM Hedwig. 



1. A. BKouereottll Lindb. (Zygodon B. ^ S.). 

 Rocks in damp shady places — frequent, but usually barren, 

 Down — Slieve Donard, Slieve Bignian, Pigeonrock Mountain, and Cove 

 Mountain ; H.W.L. Rostrevor Mountain, and Tollymore 

 Park; C.H.W. Mountains above Newcastle ; S.A.S. 

 Antrim — Trap rocks at upper end of Colin Glen ; /. H. Davies, Phytolo- 

 gist, 1859. At tbe head of Glenballyeamon, a single stem 

 in fruit in June 1863; D.M. SaUagh Braes; C.H.W. 

 Plentiful on rocks below MacArt's fort on Cave Hill ; S.A.S. 

 Derry— Basaltic cliffs of Benevenagh ; S.A.S. 

 First found in Ireland by Isaac Carroll. 



PXiEUROZYGOBOXr Lindb. 



1. P. aestlvus (Hed.) Lindb. (An. compactum Schiv.), 



Damp rocks — rare and barren. 

 Down— Steep wet rocks on Slieve Commedagh, and Slievenamady : 



H.W.L. 

 Antrim— Carnlough, and frequent in northern glens ; D.M. 



ZYGODOIO- Eook. 4- Tayl. 



1. Z. Stlrtoni Schimper. 



Damp shady places on rocks and walls — rare, and usually only in small 

 quantity. Fr. Feb. and March. 

 Down— Barren in crevices of rocks on the shore at Portavo, and fruiting 



on old wall by the roadside opposite Portavo demesne ; S.A.S. 



Annalong, and Bloody bridge ; H.W.L. 

 Antrim— Sparingly on basaltic rocks by the waterfall in Gleno, and rather 



more plentiful on the inner side of the southwest wall of the 



bridge on the Larne road at Kilroot, also on Rathlin Island ; 



S.A.S. 

 Derry — On the trunk of a tree brought from Co. Derry to Glenmore ; 



/. If. Davies. 



2. Z. ▼Irldlsslmus {Dicks.) Hook. 

 Trunks of trees — frequent, and often abundant. Fr. Feb. and March, 

 but more commonly sterile. 



