14. OSMUNDA, L.
1. O. regalis , L. Native. British type. Area C, N, D. Range 1.
Formerly in several stations, but now extirpated in most or all of them. Routing Linn near Doddington (J. Mitchell). Chevington Wood near Warkworth (T.). Rowlands Gill near Tanfield (W. H. Brown !). Crook Hall Wood near Durham (Mr. Bungey). Once seen in Teesdale near Winch Bridge, 300 yards (James Backhouse).
15. BOTRYCHIUM, Sw.
1. B. lunaria , Sw. Native. British type. Area C, N, D. Range 1, 2.
Frequent in grassy places, especially amongst the hills, ascending in the Cheviot tract to Langlee-ford Hope (James Hardy), to 400 yards in Langdon Dale, and rather higher in Rookhope.
16. OPHIOGLOSSUM, L.
1. O. vulgatum , L. Native. British type. Area C, N, D. Range 1.
Frequent in the meadows of the low country, but easily overlooked.
Order 2. MARSILEACEAE.
1. ISOETES, L.
1. I. lacustris , L. Incognit.
Reported in the Flora from Crag Lough, probably by mistake for Litorella.
2. PILULARIA, L.
1. P. globulifera , L. Native. British type. Area N. Range 1.
Submersed in ponds, rare. Prestwick Carr (F. R!), and gathered by Messrs. Waugh and Thornhill in a pond by the side of the road half-a-mile north of Wolsington House near Ponteland.