Io FLORA OF OXFORDSHIRE. 
Berks. Sonning, Hb. Br. Mus. Rudge. Abingdon Canal, abundant; 
Hinksey, Iffey meadows. 
This plant not unfrequently occurs growing with other varieties of 
Batrachium, but retains its characteristic features. 
BR. trichophyllus, Chaiz. 
Batrachium trichophyllwm, F. Sz. Syme, E. B. i. 23. 21. Nym. 15. 
Native. Lacustral. Still waters. Local and rare. May-June. 
First record, Rev. W. W. Newbould, circa 1860. 
2. Ouse. Near Hethe. 
4. Ray. Bladon and Begbrook, 1863, H. Bos., near the Crescent, 
Oxford, Bladon, Rogers, 1882. Blackthorn near Bicester, nr. 
Charlton. 
6. Thame. Cowley Marsh, 1861, H. Bos. Sandford. 
7. Thames. Pangbourne, Newd. 
Berks. Pangbourne and Streatley, Newb. Near Cookham, Britten. 
Wargrave, Melville. Abingdon! See Rep. of Rec. Club, 1881, 
p. 204, and occurs sparingly in the bordering counties. This appears 
to be a distinct plant. Its affinities are rather with circinatus than 
Drouetii from which it is easily recognisable. 
RB. Drouetii, F. Sz. 
Batrachium Drouetii, Nym. Syme, E. B. i. 22.20. Nym. 15. 
Native. Ponds, ditches, and slow streams. May—June. 
First record, W. 7. T. Dyer, 1871. Journ. Bot. vol. ix. 
3. Swere. Deddington. 
4, Ray. Pond between Woodstock Park and Station, Water Eaton 
pond. See Rep. of Rec. Club, 1881. Rousham, typical, Middle- 
ton Stoney. 
5. Isis. Burford, Handborough, Port Meadow, Bampton, Witney, 
W. Mathews, 1883. 
6. Thame. Shotover. 
Berks. Marcham, Bablock Hithe, Dyer. Bucks, Northants, Gloucesh., 
Warwick. 
This is the common pond Batrachiuwm in the Cherwell Valley. A form 
of peltatus without floating leaves is occasionally mistaken for it. The 
flowers vary somewhat in size but are always smaller than peltatus forms ; 
its much lighter green foliage, hispid receptacle and flaccid habit dis- 
tinguish it from trichophyllus. 
BR. radians, Rev. 
Batrachium diversifolium, Sch. Nym. 15. 
Native. Ponds. Rare. June. 
First record, the Author, 1883, near Bicester. 
