9 



accountable for these lacunae. Slow-flowing rivers — and lakes, 

 with the exception of mountain-tarns — are also a desideratum. 

 The entire absence of the American Pond-weed (Elodea 

 canadensis) is interesting in this connection. The Cader Idris 

 and Plynlimmon ranges (both, strictly speaking, beyond the 

 limits of our district), have hitherto proved disappointing as a 

 hunting ground for sub-alpine species. The cliffs, shingle, and 

 sand-hills of the coast have, however, given better results, and 

 the two large bogs — Cors Fochno, at Borth, and Cors Teifi, 

 between Strata Florida and Tregaron — have yielded numerous 

 marsh plants. 



The following, which occur within the twelve-mile radius, are 

 recorded from less than half of the provinces into which the 

 editor of the London Catalogue, for botanical purposes, divides the 

 British Islands.'* Bearing in mind that the total number of 

 provinces is 112, the numbers attached to the names may be 

 taken as an index of comparative rarity. 



Welsh Poppy, Meconopsis cambrica, 14. Devil's Bridge. 

 Horned Poppy, Glaucium luteum, 50. Shore at Clarach, &c. 

 Upright Vetch, Ficia orobus, 30. Edges of pastures. 

 Wall Pennywort, Cotyledon umbilicus, 53. Walls and banks. 

 English Stonecrop, Sedum anglicum, 55. Rocky hill-sides. 

 Oblong Sundew, Drosera longifolia. Cors Fochno — with the 



Common Sundew, D. rotundifolia. 

 Sea Holly, Eryngium maritimum, 50. Shore at Clarach. 

 Sea Samphire, Crithmum maritimum, 25. Cliff near Borth. 

 Marsh Andromeda, Andromeda polifolia, 29. Cors Fochno. 

 Sea Convolvulus, Calystegia soldanella, ^i. Shore at Clarach. 

 Pointed Toadflax, Linaria elatine, 55. Occasional, as a cornfield 



weed. 



Pale Toadflax, Linaria repens, 21. Common in hedges. 

 Sea Spurge, Euphorbia parcdias, 29. Sand-hills north of Borth. 

 Portland Spurge, Euphorbia portlandica, 19. Craig-y-Pistyll. 

 Sea Stork's-bill, Erodium maritimum, 33. Shore at Clarach. 

 Lesser Swine's-cress, Senebiera didyma, 40. Aberdovey. 



The following are very local in their occurrence, or are other- 

 wise of interest : — 



Globe Flower, Trollius europceus. Devil's Bridge, Crosswood. 

 Columbine, Aquilegia vulgaris. Cwm Woods. Probably, like 



Omphalodes verna, which grows near it, an escape, though 



both are well naturalized. 

 Sea Rocket, Cakile maritim£t. Borth Warren. 

 Yellow Pansy, Viola lutea. Almost the only flowering plant of 



the mountain sheep-walks. 

 Bloody Crane's-bill, Geranium sanguineum. Aberdovey. 

 Everlasting Pea, Lathyrus sylvestris. Bushy cliff-slopes. 

 Meadow Saxifrage, Saxifraga granulata. Devil's Bridge. 



