282 FLORA OF OXFORDSHIRE. 
Native. Uliginal. Marshes, wet meadows. Rather rare. P. June- 
Aug. 
First record, Stb. 1794. 
3. Swere. In a meadow near the Canal, quarter of a mile towards 
King Sutton, boggy field near Hanwell, Gull. Meadow South of 
Shutford Bridge, plentiful, T. Bees. Bretch, Bodicote, A. Fr. 
4. Ray. Bog near Upper Heyford, Bax. Stow Wood, H. Bos. Head- 
ington Wick, Marston Fields, one specimen thirty-four inches high. 
5. Isis. South Leigh Meadows, Sib. Canalside going to Wolvercote, 
also beyond Heyfield’s Hut, Bu. 1831! 1884. Wolvercote, H. E. 
Garnsey! Binsey! Cornbury, Woodstock, H. Bos. Wychwood, 
Daubeny, 1842 ! 
6. Thame. Bullingdon Green! Cowley Marsh! Sib. South side of 
Shotover! Bx. Albury, Rev. F. Bennett / 
Berks. South Hinksey, Sandford, Radley, Tubney. 
Orp. LXXVI. POTAMOGETONEA, Dumrt. 
POTAMOGETON. L. 
P. natans, L. Floating Pond Weed. 
Top. Bot. 420. Syme, E. B. ix. 26.1399. Nym. 681. Bx. 350. 
Native. Ponds, ditches, streams. Common. P. June, July. 
First record, Sib. 1794. 
2. Ouse. Ardley. 
3. Swere. Cherwell near Bridge, Gull. Somerton, Shutford. 
4. Ray. Oddington, Bayswater, Cherwell frequent, Otmoor. 
5. Isis. Eynsham, Wolvercote, Freeland, Ditchley, North Leigh, 
Bruern, Isis and Evenlode, Wychwood, pond near Duke’s Lock. 
6. Thame. Hb. Br. in Thame. Waterstock, 4. Fr. Albury. 
7. Thames. Nettlebed, Binfield, Woodcote. 
Berks. Marcham, Hinksey. Bucks, Northants,common. Gloster E., 
Kelmsford, Lechlade. Warwick. 
P. polygonifolius, Pourr. 
Syme, E. B. ix. 27. 1400. Nym. 681. P. oblongus, Vir. 
Native. Ponds and boggy heaths. Rare. P. July. 
First record, Dillenius, 1744. 
8. Swere. Cherwell near Banbury, A. I’r. Somerton. 
4. Ray. Near Oxford, Hb. Lawson, 1869. Kirtlington. 
6. Thame. ‘North side of Shotover Hill in a small boggy piece 
of ground a little before the enclosed ground begins I found it 
in July without flower, 1744, Ray says it flowers in June,’ 
D, Dillenius, MSS. The plant is the heath form P. ericetorum, 
