Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/158

on Cheviot and 750 yards on Highfield. A subglabrous variety (holostioides, Fries,) grows near the Tyne above Redheugh, in Langdon Dale, &c.

3. C. semidecandrum Cerastium semidecandrum, L. Native. British type. Area C, N, D. Range 1.
Frequent in sandy ground both along the coast and inland, ascending Coquetdale to Holystone. On the basaltic dike at Gunnerton and Kyloe. In the Wansbeck district very fine on walks near Hartburn Grange, 150 yards.

4. C. tetrandrum Cerastium diffusum, Curt. Native. Maritime. British type. Area C, N, D. Range 1.
Frequent in sandy ground along the coast-line. C. pumilum is given as a plant of the province by Winch, but his specimens are a mixture of this and the preceding.

5. C. arvense Cerastium arvense, L. Native. Xerophilous. British type. Area C, N, D. Range 1.
Frequent on the Magnesian Limestone and occasionally upon the coast-links, and in dry sandy soil elsewhere. Banks of the Tweed at Norham. On the limestone at Ratcheugh. Not known in the porphyritic tract.

Order 13. LINACEÆ.

1. LINUM, L.

1. L. usitatissimum Linum usitatissimum, L. Alien.
Occasionally cultivated and casually subspontaneous.

2. L. perenne Linum perenne, L. Native. - Xerophilous. Germanic type. Area D. Range 1.
Dry places, almost confined to the Magnesian Limestone; Marsden, Tunstall Hill, dry banks between Coxhoe and Trimdon, by the Tees at Baydales, and in several places lower down about Middleton-one-Row and Yarm.