512 ALISMACEAE 



Native. Paludal. Sides of rivers, streams, ponds, and canals, ditches, 

 and wet places. Common throughout the county in suitable situa- 

 tions. P. May-August. 

 First record. Sonning, Mr. S. Budge, in Herb. Brit. Mus. 1800. AHsma 

 plantago, Dr. Noehden, Mavor's Agr. Berkf^, 1809. 

 The Water Plantain is too frequent in Berkshire to require a list 

 of localities. 



Var. LANCEOLATUM (With. Bot. Arr. ed. 3, ii. 362 (1796), as a species), 

 Synie, E. B. t. 1438, a form with lanceolate leaves, shorter style, 

 and oval not oblong sepals, which appear to merge gradually into the 

 type, is also found scattered through all the districts. 



1. Isis. Cumnor. Buckland. Near Faringdon. Shrivenham. 



2. Ock. Marcham. Wantage. Cholsey. 3. Pang. Pangbourn. 

 Bradfield. 4. Kennet. Theale. Padworth. 5. Loddon. 



Between Wokingham and Sandford Mill, Salmon. Hurst. 

 Winkfield. Ambarrow. Clewer. Bracknell. Windsor Park. 

 A. Plantago-aquatica is found commonly in all the bordering counties. 



ECHIlSrODORUS, Ptich. in Mem. Mus. Par. i. (1815) 365. 

 E. ranunciiloides, Engelm. in Asch. Fl. Brand, i. 651. Lesser Water 

 Plantain. 

 AJisma ranunculoides, Linn. Sp. PI. 343 ' 1753). 

 Top. Bot. 409. Syme, E. B. ix. 71, t. 1439. Nyman, 679. Fl. Oxf. 280. 

 Native. Lacustral. Ditches, marshes. Very rare and local. P. June- 

 August. 

 First record. AUsma ranuncidoides, Mr. Bicheno in Mavor's Agr. Berks, 

 1809, but without locality. 



2. Ock. Sparingly at Cothill in a ditch much shaded by vegetation, 



in close proximity to the bog. 



4, Rennet. As Mr. Bicheno lived at Newbury it is probable that 

 he saw this plant in the Kennet Valley, and it is given without 

 locality in Mrs. Russell's Newbury Cat. 1839. Hitherto I have 

 been unable to find it in the Kennet Valley, which oflfei'S very 

 suitable localities. 



E. ranuncidoides is recorded for all the bordering counties, but T am 

 afraid is now extinct in Oxfordshire. 



SAGITTARIA, Linn. Gen. n. 946 {Sagiita, Dill. Gen. 4). 



S. sagittifolia, Linn. Sp. PI. 993 (1753). Arroichead. 



Top. Bot. 410. Syme, E. B. ix. 68, t. 1436. Nj^man, 679. Fl. Oxf. 281. 



Native. Lacustral. Shallow streams. Common on muddy beds of 

 streams in the lower valleys. P. July- August. 



First British record. Pistana Magonis sire PHnii, Sagittaria aquatica. In 

 Anglia prope Oxonium pone maenia in amaenissimis illic resi- 

 dibus, sed lympidissimis aquis, Label. Adversaria, 127, 1576. 



