110 
DATE. COLLECTOR. HERBARIUM. 
1281. Potamogeton natans, 
Linn. 
Ponds and ditches. 
Distrib. Throughout the World. 
Sp. Malton logs, Yorks. ... ... ... 1808 ... W. Middleton ... W. Middleton 
Bottisham Fen, Cambs. ... ... 1829 ... Rev. J. Dalton ... Rev. J. Dalton 
1282. Potamogeton polygoni- 
folius, Pour. . 
Moorland pools, etc. 
Distrib. Europe, Asia, New Zealand. 
Sp. Burwell Fen, Cambs. ... ... 1805 ... Relhan ... ... Rev. J. Dalton 
Ripon, Yorks. ... ... ... 1820 ... Rev. J. Dalton ... ,, 
Askham Bogs, York ... ... ... 1820 ... S. Hailstone ... S. Hailstone 
1283. Potamogeton plantagi- 
neus, Du Croz. 
Ponds and streams. 
Distrib. Europe, etc. 
Sp. Heslington Fields, York 
... 1844 ... 
Hy. Baines 
S. Hailstone 
Norfolk 
... (1800)... 
D. Turner 
Rev. J. Dalton 
Bottisham Fen, Cambs. 
... 1829 ... 
Rev. J. Dalton ... 
> > 
Burwell Fen, Cambs. 
... 1829 ... 
5? 
J > 
1284. Potamogeton fluitans, 
Roth. 
Pools, etc., on heaths. 
Distrib. Europe. 
Sp. Ditches, near Ripon, Yorks. ... ... 1805 ... W. Brunton ... S. Hailstone 
1285. Potamogeton rufescens, 
Schrad. 
Ponds and streams. 
Distrib. Europe, Siberia, N.W. Asia, 
N. America. 
Sp. Sussex ... ... ... ...(1800)... Teesdale ... Rev. J. Dalton 
Teesdale, Yorks. ... ... ... 1816 ... Rev. J. Dalton ... ,, 
Ripon, Yorks. . 1800 ... ,, ... ,, 
