I860.] BOTANICAL SKETCHES PROM NORTH WALES. 43 



H. albida ; the latter not nearly so common as the former. Orchis 

 maculata is the commonest Orchis in Wales, as it is everywhere 

 else in the British Isles. In a grassy bog, before reaching the 

 turnpike-road, not far from the 'Boot' inn, a few colonies of 

 Orchis latifolia were seen. This was the only locality where this 

 species was observed in this neighbourhood. 



In an old dry stone wall, on the hill to the north- west of Llyn 

 Creyny, there are many patches of the neat and pretty Parsley Fern 

 {Allosorus crispus) . The pastures of this hill also produced Habe- 

 naria bifolia and H. albida, the former more plentiful than the 

 latter ; also numerous plants of Hieracium, not in flower ; proba- 

 bly H. tridentatum. H. vulgatum was in flower everywhere from 

 Llangollen to Llan-y-Mowddy. 



The lake is small, probably nearly a mile in circumference. 

 The water is pure and clear as crystal ; it abounds in pike, which 

 suficr few other fish to reach a large size. 



The botanical productions of this small alpine lake are Isoetes 

 lacustris, Littorella lacustris, Lobelia Dortmanna, Subularia 

 aquatica, Potamogeton nutans, and probably P. pusilla, one or 

 two of the Myriophylla, and the queen of British flowers, the 

 magnificent Waterlily. 



On returning, we visited the remains of the ancient British 

 or Boman camp, Caer Creyny, on the summit of a lofty hill, 

 on which Sir W. W. Wynne erected a tower, or speculatoria, 

 which is very conspicuous. From this station a fine view is ob- 

 tainable of the vales of GlyndiSHvy and Corwen. The celebrated 

 pass and fall of Pont-y-glyn, between Cerrig-y-Druidion and 

 Corwen, is visible from this point. 



The foss and vallum of this ancient fortress are very entire, 

 though the former is very much encumbered with the debris of 

 the latter. Like that at Dinas Bran, it had been originally con- 

 structed of small stones, and there were some remains of vitrifi- 

 cation. 



In passing down the hill towards the ' Boot ' inn, we walked on 

 what appears to be an ancient Boman road, and which may pro- 

 bably be a portion of the same ancient via which led over the 

 Berwyns from the south, and which is so very complete about a 

 couple of miles above the celebrated fall of Pistyll Bhaiadr. 



Before reaching the ' Boot ' inn we turned in at a gate into a 

 sort of orchard, at a farm on the old road to Bala, and under 



