FLORA OF OXFORDSHIRE. 9 
preter fluente copiosum. This probably refers to R. flwitans. ‘Among 
the earliest of the aqueous plants—and that which is seldom out of sight 
until the Thames loses somewhat of its purity—is the Water Crowfoot, the 
large white flowers of which rise in sparkling profusion above the surface ; 
and... the curious variety in the floating and submerged leaves is very 
apparent—the former being broadly lobed while the latter are cut into 
minute thread-like divisions somewhat resembling the leaves of Fennel. 
Further down, where the stream acquires increased depth and velocity, the 
plant assumes a different character, the flat leaves entirely disappear, both 
stem and leaves being drawn out by the current into mere bundles of 
cords of great length; in this case the flowers are only produced at 
occasional intervals.’ Hall's Book of the Thames, p. 16. 
R. fluitans, Lamk. Water Buttercup. 
Batrachium fluitans,W. R. fluriatilis, Web. Top. Bot. 9. Syme, E. B. 
i.17.16. Nym.15. Native. Rivers. Frequent. June-Aug. 
First record, Sib. 1794. R. fluviatilis, Wigg. This probably included 
R. peniciliatus, Dum. 
. Swere. Canal near King Sutton. R. French. 
. Ray. Cherwell! Sid. 
. Isis. Isis and Windrush! Sid. Folly Bridge to Kelmscott. 
. Thame. Oxford, Hb. Br. Mus. M. Lawson. Nuneham, H. Bos. 
Sandford. 
7. Thames. Goring, Maple Durham, Henley, Sonning. A charac- 
teristic feature of the Thames from Bablock Hithe to Sonning. 
It varies as to the size of its flowers, but the large flowered form is 
more frequent; the smaller plant may be R. Bachii, W. 
Berks, Bucks, Northants, Gloster, and Warwick. 
aoe w 
R. circinatus, Sid. 
Batrachium circinatum, Nym. Top. Bot. 8. Syme, E. B. i. 16. 15. 
Nym. 15. 
Native. Ponds, canals, and streams, rather common. June-Aug. 
First record, Sid. 1794, and first as British. 
3. Swere. Banbury, often with aquatilis, Gull. Hardwick Rd. R. 
French. Crouch fields, Miss Rusher. Adderbury, Hb. A. Fr. 
Clattercut. 
4. Ray. Bayswater, Islip, Bos. Upper Heyford, Oxford, Bicester. 
5. Isis. South Leigh, Sid. Binsey, Bos. Isis, Hb. Br. Mus. Dyer. 
Railway Pond near Red House, H. E.Garnsey. Wolvercote, Witney, 
Handborough, Charlbury, Oxford Canal, abundant nr. Yarnton. 
6. Thame. Christ Church Meadows, Sid. Imfley, Hb. Lawson. 
Thame, Hb. Bx. Dorchester, Chiselhampton. 
7. Thames. Goring, Newbould. Henley. 
