Polygonum.] POLYGON ACE^. 307 



7. P. Persicaria Linn. — Spotted Persiecwia. 



Sibernice ^luineac Geaps {gloon-yaclc dha/rrig), Red Kneed-Plant. 

 Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XIL 

 Lat. 51^°-55i°- ThroTigliout Ireland. Type, British. 



"Waste and damp ground, and cultivated fields ; common. Fl. 

 June-September. 



Sea-level in N. Donegal and S. Cork. To 1250 ft. in Dublin 

 (iV. C). 



8. P. lapathifolium Linn. — Glandular Persiearia. 



Districts I. II. — IV. V. VIII. IX. X. XI. XII. 



Lat. 52°-55i°. From South to North. Type, British-English. 



Lowland. Cultivated ground, especially in peaty soil ; frequent. 

 Fl. July-September. 



Not always distinguished from coarse forms of the preceding 

 species and probably occurs throughout Ireland. 



P. maculatum Trimen & Dyer. 



P. nodosum Eeichb. — P. laxum Bab. 



Districts I. — III. IV. — . _ _ XII. 



Lowland. Damp gravelly places ; rare (?). -?7. July-September, 

 I. BallincoUig, Cork, 1853 (Carroll): Herl. Babington. — 



III. A few plants on a rubbish heap at Ferrybank, Kilkenny : 



M. Sf 8. i8g6. — IV. One plant on the quay at "Wexford : Marshall 



iSgb.—Xll. Marshy fields north of Dundrum, Co. Down, 1894 



{Eev. C. m WaddelT) : Ir. Nat. iSgs- 



Further observation may be expected to show that this critical 



plant is frequent in Ireland. 



9. P. amphibium Umn. — Water Bistort. 



Districts I. II. III. IV. V. VI. VII. VIII. IX. X. XL XIL 



Lat. 51i^°-55i°. Throughout Ireland. Type, British. 



Lowland. Lakes, ponds, ditches, and slow streams, also on 

 damp ground ; frequent. Fl. July-September. 



The Var. tekeesteb {Leers) occurs very frequently. 



x2 



