356 FLORA OF OXFORDSHIRE. 
E. arvense, L. Field Horsetait. 
Top. Bot. 531. Syme, E. B. xii. 152. 1889. Nym. 859. 
Native. Agrestal, etc. Fields, waysides, rail-banks, waste places. 
Abundant throughout the county. P. March. 
First record, Dillenius, ‘Hockley in the Hole,’ 1746. 
The barren stems are often decumbent. 
E. sylvaticum, L. Wood Horsetatl. 
Top. Bot.532. Syme, EH. B. xii. 156. 1891. Nym. 859. 
Native. Sylvestral. Very rare or extinct. P, April. 
First record, ib. 1794. ‘ Moist woods—shady places in boggy ground.’ 
6. Thame. Bog on north side of Shotover, Bz. Stirp. Cryp. Ox. Not 
there now. 
Berks. Bagley, Rev. H. Fox. Boar’s Hill, 1885. 
See Ger. Hm. 1115. 633, for an unnamed plant which may be this, the 
station seems in Berks. 
E. limosum, L. Smooth Horsetattl. 
Top. Bot. 533. Syme, E. B. xii. 159. 1893. Nym. 859. 
Native. Paludal, lacustral. Ditches, brooks, ponds, etc. Locally 
abundant, and after arvense the commonest species. P. June, July. 
First record, Sib. 1794. 
2. Ouse. Mixbury. 
3. Swere. Broughton, Bees. Cherwell Mill Meadow, A. Fr. Somer- 
ton. 
4. Ray. Middleton Park, H. Bos. Kirtlington, Heyford, Rousham, 
Marston, Oxford, ete. 
5. Isis. Abundant in the Wychwood ponds, Ramsden Heath, Ditchley, 
Binsey, Port Meadow, etc. 
6. Thame. Iffley, Christ Church Meadow, Albury, Rycote, Dorches- 
ter, etc. 
7. Thames. Goring, South Stoke, etc. 
Var. E. fluviatile, L. 
3. Swere. Cropredy. 
4, Ray. Marston Meadows, Otmoor. 
5. Isis. Eynsham, near Chimney, Wolvercote. 
6. Thame. Dorchester. 
7. Thames. North Stoke. 
E. palustre, L. Marsh Horsetail. 
Top. Bot. 533. Syme, E. B. xii. 157. 1892. Nym. 860. 
Native. Uliginal and paludal. Marshy, boggy places. Local. P. 
June-Aug. ; 
First record, Dillenzus, 1746, and Sir Jos. Banks, 1760, near Oxford. 
