POLYGONACEiE. 299 



IV. Knackersknowle. Riverford. 

 V. Between Harford and Cornwood. 

 VI. Ivybridge. 

 Several of the stations that I have on record as for P. lapatJufolium 

 were noted before I separated the segregate species, P. maculatum from 

 lapathifoiium genuinum, and m consequence some doubt exists as to 

 whether the records under the Cornv/all Districts i. and ii. belong to the 

 segregate genuinum. Those for the others certainly do so. 



617. P. maculatum, Dyer. 



Native ; by roadsides and in cultivated ground. Rather common ? 

 July to September, 

 c. II. One plant by the roadside near St. Mellion village, growing with 



P. Persicarid, in a damp spot, September, 1877. Carbeal. 

 D. III. One plant among vegetables at Stoke Damerel, 1878. Honic- 

 knowle. Knackersknowle. Beer Ferrers. 

 IV. Two plants by the roadside in Higher Compton Lane, August, 



1878. 

 V. Between Harford and Cornwood. Near Lutton. 

 I believe this graduates into lapathifoiium, as plants with characters 

 more or less intermediate occur. I would regard it as a variety only. 



618. P. amphibium., Z. Ara2:)hihious Bistort. 



Native ; m water ; also in damp marshes and moist waste spots. 

 Rather common. June to September, 

 c. I. Seaton. 



II. Weir Head ! ; Keys, Fl. iii. 212 ; here only, in the waters of the 

 Tamar, have I seen the aquatic form, which is consequently 

 very rare in the area. Tamar Valley. Near Calstock. 

 D III. Marsh between Morwellham and Weir Head. 



IV. Marsh, Longbridge ! ; Holmes, Keys, ih. Marsh below Shalaford 

 Lane, Egg Buckland ; in flower in August, 1867. Between 

 Colebrook and Newnham; several flower spikes, September, 

 1879. 

 VI. Mothecombe ; on a damp sand-bank. 



From what is stated above it will be apparent that all the stations 

 except " Weir Head " have reference to the land form of this species, h. 

 terrestre. This flowei's only very sparingly. 



619. P. Bistorta, L. Coramon Bistort. 



Denizen ; on hedge-banks near houses, in orchards and pastm-e 

 land. Rare. Part of ^Nlay, June, 

 c. I. Sparingly on a hedge-bank by a house near Treraaton village, 

 1868. 



