POLTGONACE^E. 205 



6. P. mite Schrank. 

 Suppl. to Eng. Bot. fol. 2867. 

 First noticed in 1836 by 0. C. B. 

 Wet places. A. August, September. 

 1. Biver-side at Barnwell. — 4. Biver-side below Water- 

 beach, plentiful. — 5. Upware. — 7. Doddington.< — 8. Wisbech. 



7. P. Hydropiper Linn. Water Pepper. 



Persicaria urens, B. C. 117. P. non macidata officinarum, 

 M. M. 15. P. Hydropiper, M. PL 9. Belli. 162. 



Wet places. A. August, September. 



1. Cambridge. — 3. Cambridge. Old Mill-dam, Grant- 

 chester. Gamlingay. Toft; N. — 4. Gravel Hill near the 

 Observatory. — 5. Snailwell. Wicken. Beche. 



9. P. minus Huds. 



Persicaria pusilla repens, B. C. 116. M.M. 15. P. minus, 

 M. PI. 9. Belh. 163. 



Wet gravelly places. A. August, September. 



4. At the end of Waterbeach Lode, next to the town; Bay. 



10. P. aviculsire Linn. Knot-grass. 



P. mas vidgare, B. C. 122. P. officinarum, M. M. 15. 

 P. aviculare, M. PL 9. Belh. 163. 



Waste and cultivated gravelly ground. A. May to 

 October. 



Common throughout the county. 



Mr Newbould believes that there are two quite distinct 

 species confounded under this name, which are about equally 

 abundant in this county. Their times of flowering differ 

 slightly, as do the forms of their nuts and colour of their 

 perianths. 



11. P. Convolvulus Linn. Black Bindweed. 

 Convolvulus niger, B. C. 38. Fegopyrum scandens syU 

 vestre, M. M. 14. P. Convolvulus, M. PL 9. Belh. 164. 



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