392 WILD FLOWERS OF 



columned Birches that in beautiful array rise on the 

 heights above the lancet arches of Yalle Crucis abbey 

 in the vale of Llangollen. The hill fortress of Castel 

 Dinas Bran in the same vicinity has become con- 

 nected with botanical research by the circumstance of 

 a variety of the White-Beam tree (Pt/rus intermedia), 

 growing as a seedling on one of its time-battered 

 walls, though in fact I myself wandering farther on 

 found many more interesting specimens of the same 

 tree interspersed with solemn Yews among the fear- 

 fully shattered crags of the limestone rocks called 

 Craig Eglwsieg, that hem in the glen farther eastward. 

 Here too, in great abundance located in the crannies 

 of disjointed masses of rock, I observed, though half 

 shrivelled up, the little Rock-Hutchinsia (H. petrcea). 

 "While botanizing about the vale of Llangollen, I 

 walked one autumnal day from Bala to Cerig-y- 

 Pruidion, spending the noontide amidst the rocks and 

 foaming "Water-breaks below Pont-y - Glyn, thence, 

 roaming to Corwen by ways embowered with the red- 

 fruited Itfiamrms frcmgula, and in the dusk of evening 

 faint and tired bathed my forehead in the Dee's moss- 

 brown waters. There was a feeling of luxurious 

 enjoyment in that at the time, looking back upon the 

 toils and aspirations of a day of poetry, and oft has 

 thought reiterated the enjoyment like a remembered 

 strain of music. Nearer to Bala a new feature is 

 given to the scene where the banks of the little river 

 Treweryn and other streams are prettily clothed with 

 the "Willow-leaved Spiraea ($. salicifolia), with here 

 and there a Cambrian Poppy on some fissured rock, 

 and the red-berried upright Bramble (Rubus sub- 

 erectus), and the Mountain Globe-flower (Trollius 



