FLORA OF OXFORDSHIRE. 315 
4, Ray. Otmoor, Bicester, Kirtlington. 
5. Isis. Port Meadow, Wolvercote, Bx./ Blenheim, Rogers/ Binsey, 
Osney, Christ Church Meadow. 
6. Thame. Waterstock, A. Fr. Tetsworth. 
7. Thames. North Stoke, Caversham. 
L. minor, L. Common Duckweed. 
Top. Bot. 486. Syme, E. B. ix. 17.1394. Nym. 756. 
Native. Lacustral. Ditches, ponds, ete. Abundant in all the districts. 
A. June, July. 
First record, Sib. 1794. 
L. gibba, LZ. 
Top. Bot. 425. Syme, E. B. ix. 22. 1396. Nym. 756. 
Native. Lacustral. Ponds and ditches. Local. A. July, Aug. 
First record, Sid. 1794. 
3. Swere. Ditch beyond Mill Meadow, Bees. With flower, A. Fr. 
1868. In Grimsbury Wharf, A. Fr. 
4. Ray. Marston, Otmoor. 
5. Isis. Ditch in Christ Church and Merton Meadow, Bz. in Purton. 
Wolvercote. 
6. Thame. Thame, Hb. Br. 
Berks. Kennington, H. EZ. Garnsey. 
L. polyrrhiza, L. Greater Duckweed. 
Spirodela polyrrhiza, Sch. 
Top. Bot. 426. Syme, E. B. ix. 23.1397. Nym. 456. 
Native. Lacustral. Ponds, ditches. Not uncommon. A. July (Si%.). 
First record, Sib. 1794. 
3. Swere. With L. trisulca and gibba, Bees. 
4. Ray. Otmoor, Marston, Magdalen College Meadow. 
5. Isis. Ditch in Christ Church and Merton Meadow, Bz. ix Purton. 
Binsey, Wolvercote, Port Meadow. 
6. Thame. Waterstock, A. Fr. 
7. Thames. North Stoke, Saunders’ Green. 
Berks. Radley. 
Orv. LXXXVI. TYPHACEA, DC. 
TYPHA. L. 
T. latifolia, D. Bullrush. Reed-mace. 
Top. Bot. 429. Syme, E. B, ix. 2. 1385. Nym. 757. 
Native. Paludal. Marshes, ponds, ditches. Rather common. P. June, 
July. 
First record, Sid. 1794. 
