144 
(Phyt., i. 453). On rocks by a stream running down to the sea at 
Hayburn wyke, near Wliitby, five miles north of Scarborough — 
Mr. Peterkin, fide R. Spruce , (Phyt., loc cit.) Reynard crags, near 
Birstwith, in Nidderdale! — H. B. Brady! J. Backhouse, Jun. 
1408. PI. Wilsoni, Hooker. Native. Scottish. 
H. unilaterale, Willd. Greenfield, (near Todmorden) — W. Wilson, 
(Phyt., i. 453). Rocks near Lower Harrogate — J. Backhouse, Jun. 
ONOCLEA. 
O. sensibilts, Linn. Alien or Incognit. 
In a lane at Moreby, near York, now extinct? — H. Baines (vide 
Phyt., i. 492). 
OSMUND A. 
1409. 0. regalis, Linn. Native. British. 
DOTPYCHIUM. 
1410. B. Lunaria, Swartz. Native. British. 
OPHIOGLOSSUM. 
1411. 0. vulgatum, Linn. Native. British. 
ORDER LXXXVIIL PTERIDOIDES. 
LYCOPODIUM. 
1412. 
L. 
clavatum, Linn. 
Native. 
British. 
1414. 
L. 
inundatum, Linn. 
Native. 
British ? 
1415. 
L. 
alpinum, Linn. 
Native. 
Highland. 
1416. 
L. 
Selago, Linn. 
Native. 
Scottish. 
1417. 
L. 
selaginoides, Linn. 
Native. 
Highland. 
ISOETES. 
1418. I. lacustris, Linn. Incognit. 
In the large lake at Castle Howard, and in the Foss reservoir at 
Coxwold — H. Ibbotson (Phyt. i. 454). Is the plant which grows 
at these localities the present species, or is it Littorella lacustris? 
I should suspect, the latter. 
