Ixxviii 



INTRODUCTION 



Ligusticum scoticum, 5. 

 Hieracium flocculosum, 2. 

 Hieracium auratum, 4. 

 Pyrola secunda, 2. 

 Melampyrum sylvaticum, 2. 

 Orobanche rubra, 5. 

 Atriplex farinosa, 5. 



Polygonum mite, 4. 

 Salix nigricans. 3. 

 Scilla Terna, 6. 

 Calamagrostis stricta, 4. 

 Cryptogramme crispa, 6. 

 Equisetum pratense, 3. 

 Pilularia globulifei'a, 5. 



40. Londonderry. 



Northern. Area 816 square miles. Maritime, with a varied 

 coast-line bordering half on the North Atlantic, half on the shallow 

 Lough Foyle. The basaltic plateau of Antrim is continued over the 

 eastern portion of Derry, resulting in high moors and some noble 

 cliff-scenery in the north. In the west mica-schist and other meta- 

 morphic rocks prevail, producing much hilly ground, and rising 

 into a high sterile mountain-chain along the SW. border (the Sperrin 

 Mountains, 2240 feet). On the eastern border, Lough Neagh, Lough 

 Beg, and the River Bann are the home of many good plants ; the 

 tidal waters of the Foyle on the NW. supply a habitat for others. 

 Otherwise, lakes are unknown and rivers inconsiderable. The south- 

 east and north-west are fertile and highly cultivated. Grass land 

 occupies 42 percent, of the surface, and crops 34 per cent. The area 

 of barren mountain is 13 per cent. Botany not so thoroughly worked 

 out as that of Down and Antrim, but still very well known. 



Flora 702 species, resembling that of Antrim, but not so rich. 

 Two species are confined to the division — Hieracium prenanthoides 

 and Hy2:)ochcBi'is glabra. 



The rarest plants are :- 



Barbarea intermedia, 5. 

 Cardamine amara, 6. 

 Silene acaulis, 4. 

 Arenaria verna, 3. 

 Eubus Cbameemorus, 2. 

 Poterium officinale, 4. 

 Eosa Mbernica, 3. 

 Eosa glauca, 4. 

 Carum verticillatum, 6. 

 Ligusticum scoticum, 5. 

 Hieracium prenanthoides, 1. 



Hypochgeris glabra, 1. 

 Pyrola secunda, 2. 

 Melampyrum sylvaticum, 2. 

 Orobanche rubra, 5. 

 Salix nigricans, 3. 

 Spirantbes Romanzoffiana, S 

 Scilla Terna, 6. 

 Calamagrostis Epigeios, 3. 

 Calamagrostis stricta, 4. 

 Cryptogramme crispa, 6. 

 Pilularia fflobulifera, 5. 



