NORTHUMBEELAND AND DURHAM. 299 



14. OSMUNDA, L. 



1. 0. regalis, L. IS'ative. 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). Chev- 

 ington "Wood near Warkworth (T.). Rowlands Gill near Tan- 

 field (W. H. Brown !). Crook Hall Wood near Durham (Mr. 

 Bungey). Once seen in Teesdale near "Winch Bridge, 300 yards 

 (James Backhouse). 



15. BOTKYCHIUM, Sw. 



1. B. limaria, Sw. Native. British type. Area C, N, D. 

 Range 1, 2. 



Frequent in grassy places, especially amongst the hills, ascend- 

 ing 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. 0. vulgatum, L. I^Tative. British type. Area C, N, D. 

 Range 1. 



Frequent in the meadows of the low country, but easily over- 

 looked. 



Order 2. MARSILEACEiE. 



1. ISOETES, L. 



1. /. lacustriSjL. Incognit. 



Reported in the Flora from Crag Lough, probably by mistake 

 for Litorella. 



2. PILULATIIA, L. 



1. P. glohulifera, L. IS'ative. British type. Area '^. 

 Range 1. 



Submersed in ponds, rare. Prestwick Carr (F. R !), and gath- 

 ered by Messrs. Waugh and Thornhill in a pond by the side of 

 the road half-a-mile north of Wolsington House near Ponteland. 



