NOETHUMBEELAND AND DUEHAM:. 77 



of birch. To reach Henhole, ■whicli is perhaps the finest, or at 

 any rate the rockiest glen of the three, from Dunsdale, the ridge 

 on the "west has to be crossed, as the glen sweeps round the west 

 end of the highest ridge so as almost to join the Langlee glen at 

 its head. Of the well-heads of the upper part of these ravines, 

 from 1500 to 1800 feet, the following are the principal plants : — 



Galtha palustris. 

 Sedum villosum. 

 Saxifraga stellar is. 

 Epilobium obscurum. 



alsinifolium. 

 Myosotis repens. 

 Montia fontana. 

 Stellai'ia uliginosa. 

 Paniassia palustris. 



Lyclmis flos-cnculi. 

 Taraxacum palustre. 

 Carduus palustris. 

 Galium palustre. 

 Juncus effusus. 



lamprocarpus. 

 Carex pulicaris. 



panicea. 



Tula'aris. 



Amongst the debris there is abundance of Allosorus crispiis, 

 but the only other rare fern, Asplenmm viride, is more diflS.cult 

 to find. The more note-worthy montane plants of the crags 

 are — Sedum rhodiola, Hieracium argenteum and pallidum, Ruhus 

 saxatilis, Poa Balfourii, Saxifraga hyimoides, and Epilolium an- 

 gustifolium. The streams of these raviues join at Southernknow, 

 3 miles below which is the finest of the low-level Cheviot water- 

 falls, Heathpool Linn. On the south is a dry bell-shaped hill, 

 1700 feet in altitude, and on the north a porphyritic crag sweeps 

 down suddenly into the stream, contracting it for a space of 30 

 or 40 yards into a narrow rocky channel. The rocky banks 

 are overgrown by bright-green shade-loving mosses, and over- 

 shadowed by ash and elm ; and a natural wood of oak, rowan, 

 and birch extends along the slope of the southern hill. Here 

 grow JDianthus deltoides, Euonymus europceus, Poa nemoralis, 

 Epilolium angustifolium, Hieracium argenteiun and crocatum. 

 At Eork-N'ewton the Glen is joined by the Beaumont, which 

 rises on the Scotch side of the Cheviot mass, and sweeps round 

 it in a curve past Yetholm and Mindrum. The Xilham Hills, 

 which are enclosed in the angle between the two streams, are a 

 series of rounded tors not exceeding 1000 feet in height, dry. 



