162 GUERNSE Y. 
Growing in the water with submerged stems and floating leaves. 
Millpond below St. Peter’s Church. Pool on the eastern side of 
Lancresse Common. Stream between Grande Mare and Vazon. 
Small pool near Albecq. Valley west of St. Saviour’s Church 
(Andrews). Var. terrestre, Moench. Growing in marshy ground: 
stems more or less erect. Rocques Barrées (1x.). Moist meadows 
near Rocque Maingy. Rue d’Enfer, near King’s Mills. 
Polygonum lapathifolium, L. Paleflowered Persicaria. 
Native. First record: Babington, 1839. 
Rather rare, and mostly in the north and west. Plentiful in a 
cornfield at Baubigny, and in several cultivated fields at the Vale in 
1889 and 1890. Here and there in V1., vil., and viii. in fields and 
on manure heaps. Growing in the sand at Lerée Bay sparingly in 
1891, and the following years. 
Polygonum maculatum, Dyer.  Slender-headed Persicaria. 
Native. First record: Babington, 1839. 
Very rare. Roadside at Lerée Bay, in considerable quantity in 
1891: a prostrate form with very thick joints. It is noted for the 
Vale in #7. Sarn. under the name of P. daxum. ‘T. Archer Briggs 
observes with regard to this species (77 Plym.): ‘I believe this 
graduates into /apathifolium, as plants with characters more or less 
intermediate occur.’ He allows it specific rank, however, like the 
last edition of the Manual and the London Catalogue. 
Polygonum Persicaria, L. Spotted Persicaria. 
Native. First record: Gosselin, 1815. 
Common as a weed in cultivated ground, and on roadsides and 
waste places. 
Polygonum mite, Schrank. Laxflowered Persicaria. 
Casual (?). First record: Marquand, 1891. 
Very rare. I found a single specimen in 1890 on the roadside 
at Les Caches, St. Saviour’s. This species is rare throughout 
Normandy in general, and does not occur in the Department of 
La Manche, the portion nearest to these islands. 
Polygonum Hydropiper, L. Water Pepper. 
Native. First record: Gosselin, 1815. 
Rare. In the two valleys at Petit Bot, and in Saints Bay 
Valley. Below Le Casrouge (Iv.). Roadside behind St. Helena. 
Streamside in Talbots Valley. Damp hollow on the western side of 
Lancresse. Mr. Andrews has found it in the valley below Les 
Issues (vul.), near Les Vinaires (vi.), by the millpond below St. 
Peter’s Church, and in a ditch near Ivy Castle. 
The Normandy name for this plant is Potvre d’eau, the equivalent 
of Water Pepper and Hydropiper, the leaves being so acrid that 
