109 
935. P. lapathifolium, Linn. Native. ' British. 
Cultivated ground and waste places ; common. P nodosum, Pen . ; 
a variety of this species sometimes occurs. 
934b. P. laxum, JE.B.S. Native. English. 
Cultivated fields between Hawnby and Laskill, Bilsdale. Perhaps 
not unfrequent, but doubtfully distinct as a species from the pro- 
ceeding. 
935. P. Persicaria, Linn. Native. British. 
936. P. mite, Schrank. Native. English. 
Banks of the Eoss, near York — W. Borrer. Very plentiful about 
the great ditch on Knavesmire, near York! — 0. A. Moore , J. Back- 
house, Jun. 
937. P. Hydropiper, Linn. Native. ‘ British. 
938. P. minus, Huds. Native. English. 
939. P. aviculare, Linn. Native. British. 
A much branched maritime form, probably P. littorale, of authors, 
grows amongst the Coatham marshes. 
P. Fagopyrum, Linn. Alen. 
941. P. Convolvulus, Linn. Native. British. 
A variety with winged perianth segments is not unfrequent. 
RUMEX. 
943. R. Hydrolapathum, Linn. Native. English. 
944. R. crispus, Linn. Native. British. 
944. * R. aquaticus, Linn. Native. Scottish. 
River banks and road sides, especially in the hilly districts ; locally 
plentiful. Banks of the Ouse, Acomb and Clifton ings, near York, 
where it was discovered by Mr. Borrer. Near Settle — J. Backhouse , 
Jun. Near Hawes, Wensleydale — O. A. Moore. Banks of the Swale, 
near Richmond — J. Ward. Ditches near Kirby Wiske — T. Simpson. 
Wince bridge, Holwick, and other places in Teesdale. 
945. R. pratensis, M. et K. Native. English. 
River banks and waste ground ; rare. Easby, near Richmond — J. 
Ward. Banks of the Foss near Earsley bridge, Heworth moor, and 
near Hawes, Wensleydale— O. A. Moore. Fields near the Foss at 
York — J. Backhouse, Jun, Banks of Codbeck, Blakey bridge, and 
other places near Thirsk. 
947. R. obtusifoIiIus, Linn. Native. British. 
948. R. sanguineus, Linn. Native. British. 
Roadsides and waste ground ; common. 
948.* R. conglomeratus, Murr. Native. British. 
R. acutus, Flora, 142. 
