POLYGONUM 423 



3. Pang. Moulsford. Streatley. Pangbourn. Purley. Near Reading. 



4. Kennet. Mouth of the Kennet, Tufnail. Theale. Beenham. 



Inkpen. Mortimer. Midgham. Southcote. 



5. Loddon. Maidenhead, Babington. Sonning Lock, Tufnail. Hurley. 



Bisham. Aston Ferry. Wargrave. Coleman's Moor. Hurst. 

 Ruscombe. Swinley. Bray. Bracknell. Old Windsor. 

 A prostrate form occurred by the Thames near Sandford and at 

 Marcham in the saline meadow ; this latter form, which is inter- 

 mediate between A. deltoidea and the var. prostrata, Bab., was distributed 

 through the Bot. Exch. Club in 1891 by the author, see Report, p. 343. 

 A. deltoidea occurs in all the bordering counties. 



**A. HORTENSis, Linn. Sp. PI. 1053 (1753), var. r libra (Crantz, Inst. 1. 206, as 

 a species). 



Occurred as a casiial on rubbish-heaps on Abingdon Eacecouxse, and by 

 the railway near Maidenhead. 



[A. Babingtonii, of the Well. Coll. List, 1894, is an error.] 



POLYGONACEAE, Lindl. Nat. Syst. ed. 2, 211 (1836). 

 POLYGONUM, Linn. Gen. n. 445 (Tournefort, Inst. t. 290). 

 P. Convolvulus, Linn. Sp. PI. 364 (1753). Black Bindweed. 

 Top. Bot. 356. Syme, E. B. viii. 61, t. 1227. Nyman, 637. Fl. Oxf. 255. 

 Native, Agrestal. Cornfields, garden ground, hedge- banks, &c. 

 Generally distributed over the cultivated portion of the county. 

 A. June-October. 

 First record. Without localities, BusselTs Catalogue, 1839. 



Var. STJBALATUM, V. Hall (var. pseudo-fhcmetorum, Watson, Lond. Cat. 

 ed. 6 (1861) 19). Both the type and the variety are too frequent to 

 need a detailed list of localities ; the former is the common cornfield 

 weed, the latter is chiefly found in rich garden-ground, hedges, and 

 bushy places. 



Polygonum Convolvulus is found in all the bordering counties. 



P. dumetorum, Linn. Sp. PI. ed. 2, 522 (1762% 



Top. Bot. 357. Syme, E. B. viii. 62, t. 1228. Nyman, 636. 

 Native. Septal. Hedges and borders of woods. Very local. A, July- 

 September. 

 First found at Tubney, Berkshire, by the author. See Eeport of Bot. 

 Exch. Club, 343, 1891. 

 2. Ock. Plentiful on the border of Tubney Wood, where in the 

 autumn it is a beautiful sight from the luxuriance of its 

 growth. In the hedge of a field between Tubney Wood and 

 Besilsleigh, not far from Appleton. Also on the border of 

 White Hart Wood. On the garden-fence of H. F. Galpin, Esq., 

 D.C.L., Boar's Hill. 



