162 POLYGONACEJB. 



69. P. amphibium, L. 



Native ; in watery places, frequent. 



G. Alveston. Boiling Well. In the Avon at Conham 

 and elsewhere. Glen Frome, Stapleton. 



S. Axbridge. Clevedon. Nailsea Moor. Yatton. 

 Marsh ditches between Burnham and Brent Knoll. 

 In a marsh near Ham Green. In ditches between 

 Weston Junction and Weston-super-Mare. In the 

 Avon near Bath, and in the Kennet and Avon Canal. 



VII. IX. 

 670. P. lapathifolium, L. 



Native ; in damp waste ground, and on manure heaps, 

 common. VII. IX. 



6.71. P. Persicaria, L. 



Native ; in cultivated and waste ground, very common. 



VII. IX. 



672. P. mite, Schrank. 



Native. Very rare. At present this species has only been 

 gathered on the peat near Edington Station, S. ; where 

 it was observed by the Rev. R. Murray. 



673. P. Hydropiper, L. 



Native ; in wet places by rivers, ditches, and ponds, very 

 common. VIII. IX. 



674. P. aviculare, L. Common Knot-grass. 



Native ; by roadsides and in waste ground, very common. 



The var. p. P. littorale, Link, is singularly absent from 



our coast. V. IX. 



675. P. Convolvulus, L. Black Bind-weed. 



Native; in cultivated ground and waste places, very 



common. 

 A plant that appears to be the var. p. pseudo-dumetorum, 



Wats, is not infrequent in hedges and thickets. 



VII. IX. 



