POLYGONUM—-RUMEX. 363 
over Hawnby. Polygonum maculatum has been met with at 
South Otterington and between Thirsk and Woodend. 
Polygonum Persicaria L. British type. Native. Area 
general. Range o-350. Frequent in similar situations to the 
preceding, ascending as high as field cultivation reaches. 
Polygonum mite Schrank. Germanic type. Native. 
Arda 6l 2 ro Range o-r00. Watery places in the low country, 
rare. Banks of the Foss near York, and of the great ditch on 
Knavesmire. Banks of the Wiske at Newsham and ditches 
near Sandhutton. Askham Bogs; Æ A. Lees. 
Polygonum Hydropiper L. British type. Native. Area 
general, Range 0-300. Frequent in watery places in the low 
country, ascending to the upper part of Coverdale, and to 
Hawes and Semer water 3 J. Percival. 
Polygonum minus Huds. English type. Native. Area 
8.6.21. Range o-100. Watery places in the low country, 
rare. Bolton-on-Swale, banks of the Wiske at Yafforth and 
Kirkby, and with Polygonum mite in the neighbourhood of York. 
Dyke-side, Dringhouses end of Askham Bog; #. A. Lees, 
Polygonum aviculare I. British type. Native. Area 
general. Range 0-400. Common in cultivated fields and about 
roadsides, ascending to the Shaw Paddock Inn, and coalpits at 
the foot of Dod Fell. Polygonum agrestinum Jordan is frequent 
in rich soil. 
Polygonum Convolvulus L. British type. Colonist, 
Area general. Range 0-300. Common in cultivated fields 
throughout the lower zone. 
Polygonum Fagopyrum L. Alien. Casually subspon- 
taneous in waste ground. Bedale, Semerdale, etc. 
Rumex Hydrolapathum L. English type. Native. 
Area8 765.321. Range 0-100. Not unfrequent in ditches 
and swamps in the low country. Carthorpe, Nunwick, Askham 
Bogs, Newby Wiske Carr, Newsham Carr, Crathorn, about the 
Foss at Huntington and the Derwent at Crambeck. 
July 1892. 
