OVER THE HILLS OF THE NOIITH OF ENGLAND. 265
the precipices of the Porphyritic, Slate, and CarbonilVrous districts. Un- known in the Oolitic tract.
45. H. arr/eufeum. Two or three stations only in the Slate and Por- phyry. Unknown in the Oolitic and Carboniferous hills.
'i'. H. Lawsoni. Unknown in the Porphyry and Oolite. Nnmerous stations scattered over the Slate tract. In the Carboniferons district in several places in Teesdale and Swaledale, but not known elsewhere.
47. H. iricnm. Unknown amongst the Slate, Oolite, and Porphyry. In the Carboniferous tract frequent in Teesdale through the Superagrarian zone, but not known in any of the other dales.
48. H. f/othicum. One station each in the Porphyry and Oolite. Scat- tered over the Slate and Carboniferons tracts.
49. H. strictiim. Two stations only in the Slate tract. Unknown in the other three districts.
50. H. crocatum. Streamsides of the Agrarian region zone in all the four districts, but in the Oolite in one station only.
51. H. corymboHum. One station in the Porphyry. In the Carbonife- rous tract plentiful in Teesdale, and occurring also in Swaledale and Yore- dale. Unknown amongst the Slate and Oolite.
52. H. prenauthoides. One station in the Porphyry. In the Carboni- ferous tract, unknown in Teesdale, which is much the richest valley for the genus in general, but there are single stations each in Tynedale, Swaledale, and Yoredale. Unknown in the Slate and Oolite.
53. Sai(ssu?-ea alpina. In the Slate tract, one station long known in Helvellyn at 8900 yards. Unknown in the other three districts.
54. Carduus heterophyllns. Frequent in the dale woods and meadows of the Slate and Carboniferous hills. Occurs also in the Porphyry, and in one place in the Oolite.
55. Gnapludinm dloicum. Widely spread over all the four districts.
56. Cumpcniala lutifolia. Prequent in the four districts; rare above the Midagrarian zone.
57. Lobelia Dortmanna. Unknown in the Porphyry, Oolite, and Car- boniferous tracts. Plentiful in the Slate tract in all the large lakes, and ascending in the tarns up to 500 yards.
58. Arbutus Uva-ursi. Unknown in the Porphyry and Oolite. In two or three stations each in the Carboniferous and Slate tracts in the Superagrarian zone.
59. Facciuium uliginosum. Unknown in the Porphyritic, Slate, and Oolitic tracts. In the Carboniferous tract in one isolated station in Tees- dale, and two or three in the Midagrarian zone in Tynedale.
60. V. Fitis-IdfBa. Frequent in all the four districts, in each ascend- ing to nearly the summits of the highest peaks.
61. Pijrola media. Unknown in the Porphyritic tract. Scattered through the three oth(;r districts in the Midagrarian zone only.
62. P. minor. Like the preceding, not known in the Porphyry, and scattered through the three other districts, but ascending in the Carboni- ferous tract into the Superagrarian zone.
63. i^ secmida. Unknown in the Oolite. Known in one station'each in the Porphyritic and Carboniferous tracts, and in two in the Slate district.
64. Barlsia alpina. Plentiful in the Carboniferous tract in Upper Teesdale on both sides of the river. Unknown elsewhere.
65. Melampijrnm .ti/Ivaficnm. Unknown in the Porphyry and Oolite.
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