yards. Oh the basaltic crags near Belford, 150 yards (T.)., Bavington, Gunnerton, Crag Lough, and Walltown, sparingly, and in South Tynedale on the banks of the Hartley Burn. In Teesdale and Weardale not unfrequent, ascending to 2000 feet on Stangend Rigg above Allenheads.
5. CYSTOPTERIS, Bernh.
1. C. fragilis, Bernh. Native. British type. Area C, N, D. Range 1, 2.
Frequent on walls and rocks amongst the hills, ascending to 600 yards in the Cheviot ravines and on the Main Limestone scars of Kilhope and Bleak Law, descending to Castle Eden Dene, Cawsey Dene, and Ravensworth Woods.
6. POLYSTICHUM, Roth.
1. P. lonchitis, Both. Native. Highland type. Area C, D. Range 1, 2.
Near the railway between Alnwick and Morpeth, at an elevation of under 100 yards above sea-level. In Teesdale on Falcon Clints, 400-450 yards, now nearly or quite extinct.
2. P. aculeatum, Both. Native. British type. Area C, N, D. Range 1, 2.
Woods and rocky places, frequent, ascending into the Cheviot ravines, and to 600 yards on the Main Limestone scars at Bleak Law.
3. P. angulare, Newm. Native. English type. Area C, D. Range 1.
Near Wooler in Humbleton Dene, Akeld Dene, and amongst the crags above the lower part of the Common Burn, 250 yards (James Hardy). Cauledge Woods near Alnwick (W. Richardson!). Castle Eden Dene (Mrs. Marley, fide Moore).
7. LASTREA, Presl.
1. L. thelypteris, Presl. Native. English type. Area C. Range 1.
Leannouth Bog near Cornhill (B. Embleton. T.).
