ill 
DATE. COLLECTOR. 
1286. Potamogeton hetero- 
phyllus, Schreb. 
Ponds and streams from Isla and 
Caithness southwards. 
Distrib. Europe. 
Sp. Burwell Fen, Cambs. 
Potteric Carr, near Doncaster 
Shropshire 
Loch of Clunie 
Ripon, Yorks. 
... 1829 ... Rev. J. Dalton ... 
... 1850 ... 0. A. Moore 
... 1820 ... Rev. J. Dalton ... 
... 1809 ... W. Middleton ... 
... 1880 ... Rev. J. Dalton ... 
1287. Potamogeton lucens, 
Linn. 
Lakes and streams from Aberdeen and 
Argyle to Devon and Kent. 
Distrib. Europe, N. Africa, N.W. India, 
N. America. 
Sp. Sussex 
Loch of Monyvaird, Perthshire 
Near Ripon, Yorks. ... 
River Derwent, Malton, Yorks. 
1880 
1842 
1800 
1803 
Rev. J. Dalton ... 
Lady Keith Murray 
W. Brunton 
W. Middleton ... 
1288. Potamogeton praelongus, 
Wulf. 
Deep waters, chiefly on the East from 
Nairn to Berks, and Surrey. 
Distrib. Europe, Himalaya, America. 
Sp. River Waveney, Bungay, Suffolk ... 1843 ... D. Stock 
1289. Potamogeton perfolia- 
tus, Linn. 
Ponds and streams , common. 
Distrib. Europe, N. Africa, N.W. India, 
America. 
Sp. River Aire, Kirkstall, near Leeds ... 1826 ... S. Hailstone 
River Wharfe, at Castley, Yorks. ... 1830 ... ,, 
Burwell and Bottisham Fens, Cambs. 1845 ... ,, 
Boroughbridge, Yorks. ... ... 1820 ... W. Middleton 
HERBARIUM. 
Rev. J. Dalton 
O. A. Moore 
Rev. J. Dalton 
W. Middleton 
Rev. J. Dalton 
Rev. J. Dalton 
S. Hailstone 
Rev. J. Dalton 
W. Middleton 
S. Hailstone 
S. Hailstone 
5 * 
W. Middleton 
