286 FLORA OF OXFORDSHIRE. 
P. pusillus, L. 
Top. Bot. 414. Syme, E. B. ix. 50. 1419. Nym. 683. 
Native. Streams, ditches, ponds. Notcommon. P. June, July. 
First record, Sib. 1794. 
3. Swere. Brook between Cherwell and Canal, between Banbury 
and King Sutton, T. Bees. Cherwell, towards Franklin’s Knob, 
A, Fr. Somerton. 
4. Ray. Kirtlington. 
5. Isis. Port Meadow, 82b. Ponds at Burford Priory, Wolvercote, 
H. Bos. River near Bruern Abbey, Canal near Wolvercote, 
Bampton, Osney. 
6. Thame. Below Iffley Mill. 
Berks. Frilford, Iffey, and all the border counties. 
P. pectinatus, L. 
Top. Bot. 413. Syme, E. B. ix. 52.1422. Nym. 683. 
Native. Ponds, canals, rivers. Common in all the districts except the 
Stour. P. July, Aug. 
First record, Sib. 1794. 
P. junceus, K. 
P. flabellatus, Bab. P. zosteraceus, Bab. non Fries. 
Syme, E. B. ix. 52. 1421. 
Native. Rapid flowing streams. Locally plentiful. P. July. 
First record, D. Thorp in Hb. Sherard, without date; first certain 
record, T. Beesley, 1851. 
3. Swere. Canal towards King Sutton, P. zosteraceus, 1851, seen 
floating in Canal at Hardwick, also plentiful in brook Hardwick 
Road, Bees. 
4. Ray. Kirtlington, Heyford. 
5. Isis. Port Meadow, see Rep. of Rec. Club, 1880. River above 
Medley, B. King! Very fine, abundant hence to Kelmscott, 
flowering freely. 
6. Thame. Iffey, Sandford, etc. 
7. Thames. Sonning, etc. 
Berks. Thames from Tadpole downwards. Bucks, Northants, Gloster 
E., Warwick. 
This may be the Pondweed referred to by Merrett, 1666, Potamogeiton 
Pusillum folio gramineo, caule rotundo in Thames near Oxford, C. C. 
ZANNICHELLIA. L. 
Z. palustris, Fr. 
Z. major, Boen. Z. brachystemon, Gay. 
Top. Bot. 423. Syme, E. B. ix. 56.1425. Nym.684. Bx. 164, not typical. 
