78 



3. Meconopsis Cambrica, Virr. 3, 4, 5, fi, 7. Northern, Contral, 

 and Southern Grotips. Abundant throiiffhont the Welsh Counties, and advancing 

 into our area in the Black Mountain District. The Welsh Poppy is, properly- 

 speaking, a Glen plant, loving the damp shade of rocky ravines ; descending in 

 them nearly to sea-level in Carnarvonshire, and ascending from them to the 

 cliffs ; but al)sent from their higher portions. In the Black Mountain it is 

 entirely a cliff plant, and is absent (?) from the Glens. Absent, northwards, from 

 Scotland, and the English Lakes (?) ; present southwards, as far as Cornwall. 



4. Arabia petraea. Lam. 1, 5? Northern and Central? Groups. 

 This Rock Cress is quite one of the rarer cliff plants throughout the British Isles ; 

 reaching its greatest frequency in the Eastern Highlands of Scotland. Rare in 

 the English Lakeland ; rare in Wales. I have only seen it at 2,900 or 3,000 

 feet, upon Clogwyn-y-Garnedd. Absent southward ? Queried by Watson for 

 " Merioneth ; " and doubtless upon Cader Idris, if anywhere in that county ; but 

 I have never found it there. 



5. Cochlearia alpina, Bab. 1, 2, 3, 4, 5. Northern and Central 

 Groups. A frequent and very characteristic cliff plant, preferring those that are 

 very wet and cold, and advancing to their highest parts. This alpine form of 

 Scurvy Grass is found, rarely, by streams in stations intermediate between the 

 cliff and the sea-shore, as e.g., on river rocks in Lowther Park, Westmorland, and 

 in other stations in the English Lakes. See Baker's Flora of the English Lakeland, 

 p. 31. Not apparently found in such positions, unless the streams take their rise 

 in mountains with cliffs of sufficient altitude to produce it: absent, therefore, 

 from the Wye and Usk, and other Radnorshire, Breconshire, and Montgomery- 

 shire rivers. Hence the inference appears warranted that the plant descends to its 

 lower stations from the mountain cliffs. Its absence from 6, the Brecon Beacons, 

 is remarkable. Abundant northwards in the English Lakes and Scotland. 



6. Polygala vulgaris, £., var. grandiflora? 2, 4. Northern 

 group. A noteworthy variety of the common Milkwort is abundant in the Cwm 

 Idwall and Llyn Dulyn cliffs, which approaches very nearly the Irish form 

 grandiflora, from Ben Bulben. Its handsome flowers are imiformly of a dark 

 blue, and it is in full flower in August, when the lowland plant is mostly past 

 blooming. Absent from the higher Carnarvonshire cliffs, and absent southwards. 



7. Silene maritima. With. 1, 2, 3, 5 (?) 6. Northern, Central? 

 and Southern Groups. The mountain form of the Sea Campion is scattered 

 throughout Wales, but only upon the higher cliffs, where it ascends nearly or 

 quite to their highest parts. I did not meet with it on Cader Idris, and suspect 

 that it is absent from the Central Group. The central cliff of the Brecon Beacon 

 range is remarkable for the abundance and luxuriance of this plant, which here 

 crowns the rocks up to their highest ranges. The flowers of the mountain form 

 are larger and finer than those of the plant of the sea shores. Absent from the 

 Black Mountain.' Present northwards in Lakeland and Scotland. 



The Sea Campion occurs sometimes inland, at low altitudes, on river gravel 

 and sand ; as on the Ystwyth, near Aberystwyth, and on the Teifi marshes, near 

 Strata Florida. In the latter instance the plant appears to liave ascended the 



