POTAaiOGETONACEiE. 209 



805. P. polygonifolius, ['oun-. 



Native; iu ditches aiul slow streainf=, frequent. 

 G. Dursley. Berkeley. Yate Common. 

 S. Ill the canal at riadfortl. South Brent, Pools ou 

 Mendip near the ]\Iineries and towards Wells. VII. 



806. P. rufescens, schrad. 



Native ; in slow streams and ditches, rare. 



G. Near St. Pliilip's Marsh ; Dr. H. 0. Stephens. 



S. IMarsh ditches near Axbridge. VII. 



807. P. lucens, L. 



Native ; in rivers and Jeepish water, frequent. 



S. Frequent in the Avon between Bath and Bristol, In 

 the river Brue. In the canal near Radford. Nailsea 

 Moor. VI. 



808. P. perfoliatus, L. 



Native ; in deep water, rare. 



S. Plentiful in the canal near Bath. In the river Avon 

 at Brislington. VII. 



809. P. crispus, L, 



Native ; in ditches and ponds, common. VI, 



810. P. pusillus, L. 



Native ; iu ditches and ponds, frequent, 



G. River Frome near Stapletou ; Mr. G. H. K. Thwaitcs. 



S, River Avon near the Cotton Mills, and towards 



Keyiisham, In the canal by Bath; Add. Fl. Bathov. 



Yatton. VI. 



811. P. pectinatus, L. 



Native ; in marsh ditches, frequent. 



G. Ditches in Shirehampton Marshes. St. Philip's 



Marsh. 

 S. Ditches near Pill ; Mr. W. E. Green. Kingston 



Seymour ; Mr. D. Fry. VI. VII. 



Q 



