2.56 FLORA OF OXFORDSHIRE. 
P, amphibium, L. 
Top. Bot. 354. Syme, E. B. viii. 77. 1241. Nym. 636. 
Native. Ponds, rivers, ditches, etc. Frequent and generally dis- 
tributed. P. July—Sept. 
First record, Sib. 1794. 
Var. P. terrestre. Damp fields. Rather common. 
. Swere. 2nd March near Canal, Gull. Mill Meadow, A. Fr. 
. Ray. Heyford, Marston, Magdalen College Meadow. 
. Isis. Wolvercote, H. Bos. Hynsham. 
. Thame. Dorchester, Sandford. 
. Thames. Mongewell. 
Wy WO oR oo 
. lapathifolium, L. 
Top. Bot. 354. Syme, E. B. viii. 75. 1239. Nym. 637. 
Native. Agrestal. Cultivated ground, waste places. Common. A. 
July—Oct. 
First record, J. Bobart, 1696, and first as British. Persicaria mitis 
major foltis pallidioribus. 
8. Swere. Mill Field, Gull. 
4. Ray. Otmoor, Marston, Elsfield, Heyford, etc. 
5. Isis. Medley Lock, H. Bos. Eynsham, Bruern, etc. 
6. Thame. In the land and furrows of Headington Field above 
St. Bartholomew’s Hospital, half a mile from Oxford, sufficiently 
plentiful, Jacobo Bobarto, Observ. et descript., Ray, ed. ii. Cowley, 
Shotover, Bullingdon, Dorchester. 
7. Thames. Mongewell, Binfield, etc. 
Berks. Boar’s Hill, Childswell Farm. 
Var. P. maculatum, Sibth. Fl. Ox. p. 129. Spotted Stalked Snake Weed. 
Persicaria latifolia geniculata, caulibus maculatis, Raii, Syn. 145. 
Polygonum pensylvanicum var. caule maculato, Curt. Fl. Lond. 
P. nodosum, Reich. Ic. 496. P. laxum, Bab. P. maculatum, Trim. and 
Dyer. 
Native. Cornfields, waste ground, river-banks, etc. Locally common. 
A. July-Sept. 
First record, Sib. 1794. 
2. Ouse. Mixbury. 
4. Ray. Otmoor abundant, Kirtlington. Marston riverside most 
abundant and typical. 
5. Isis. Osney, Oxford, Wolvercote, Port Meadow. 
6. Thame. Iffley, Sandford. 
7. Thames. Goring. 
Berks. Ferry Hinksey, Kennington. Bucks, Northants, Warwick. 
Both forms densum and gracile occur. 
