140 NOTES ON POLYGONUM AVICULARE. 
Beta maritima (Li), Salsela Kali, (4), and Schoberia maritima, 
(Mey), are to be noticed here and there. 
Polygonum rurivagum,* Jordan.—Old Hartlepool. 
Polygonum microspermum, Jordan.—Stockton and Seaham. 
Polygonum aviculare, L.—Hyverywhere. 
Polygonum arenastrum, Jordan.—Seaham. 
Rumex maritimus, L.—On the West Hartlepool Ballast Heaps; 
abundant. 
Mercurialis annua, L.—Old and West Hartlepool; frequent. 
Apera spica-venti, Beauvy.—Two or three luxuriant plants, 
near the extremity of the West Hartlepool deposits. 
Glyceria rigida, Sm.—Frequent on the Ballast Hills as well 
as in many other less suspicious localities in this county. 
Glyceria loliacea, Sm.—A single plant. West Hartlepool. 
Hordeum maritimum, With.—On the made ground at West 
Hartlepool; and also found in many places on the 
sea-wall between Port Clarence and Greatham. 
Lepturus filiformis, Frm.—West Hartlepool Ballast Hills; 
scarce. 
Many of the plants in the preceding list have not previously 
been observed, I believe, in the Tyne province, even as intro- 
duced species. 
SEDGEFIELD, JANUARY 6, 1861. 
XX VI.—WNotes on the Species into which the Linnean Polygonum 
aviculare has been divided by Continental Botanists. By the 
Rev. Aurrep Merits Norman, M.A. 
Unper the name of Polygonum aviculare, British botanists have 
up to the present time included a greater number of forms, than 
perhaps remain in these days of ‘‘Segregate species,” under any 
other title among our Phanerogamia. Ii is far otherwise on the 
Continent, where the Linnean aviculare has been sub-divided into 
* For description and remarks on this, and the three following species, see the next 
paper. 
