near the head of the Knucton Burn, in Weardale plentiful in the upper part, but in Teesdale much less abundant than phylicifolia. Castle Eden Dene. We include here a wide range of forms, amongst which are rupestris, hirta, and Andersoniana of English Botany.
13. S. laurina, Sm. Native. Scottish type. Area C, N, D. Range 1, 2.
Rothley Lake and hedges north of Cambo (E!). In the upper part of the dale of the Derwent on the banks of the Knucton and Beldon Burns (F!). Gathered on the banks of the former by Mr. Baker in 1865, at an elevation of 1400 feet. S. tenuifolia is recorded by Dr. Johnston from Learmouth Bog.
14. S. phylicifolia, L. Native. Scottish type. Area C, N, D. Range 1, 2.
Not noticed in the Cheviot tract, but most likely overlooked. By the Tyne in several places. By the Irthing at Wardrew, and abundant in the upper part of Allendale, Derwentdale, Weardale, and especially of Teesdale, ascending to 400 yards in Irishope, 500 yards near Allenheads, and 550 on the limestone scars in Harwood Dale with aurita. The common forms with us are Weigeliana, nitens, and Croweana, and a plant from Prestwick Carr is called radicans by Smith in Winch's collection.
15. S. repens, L. Native. British type. Area C, N, D. Range 1, 2.
Common on heaths, ascending to 450 yards in Teesdale and Derwentdale, 500 yards in Harwood Dale.
16. S. ambigua, Ehrh. Native. British type. Area N. Range 1.
On the edge of Dilston Fell by the side of the high-road between Dilston and Hexham, 150 yards, growing in small quantity amongst S. aurita and repens, between which it is probably a hybrid (B.).
