Polygonum.] POLVGONE/E. 225 



pentandrous ; styles forked ; spike oblongoovate ; leaves petio- 

 late, cordato-lanceolate, rough at the margins. Br. Fl. 1. p. 183. 

 E. FL v. ii. p. 232. E. Bot. t. 436. 



*. aquaticum, leaves floating, broadly lanceolate, glabrous ; 

 spikes oblong. 



ft. terrestre, nearly erect ; leaves narrow, lanceolate, rough, 

 with short, rigid, appressed hairs on both sides; spikes ovate. 



Ponds, lakes, and ditches, on their margins, frequent. Fl. July, 

 Aug. %. Stem 2 3 feet long, scarcely branched when growing in 

 the water. Leaves arising from long, tubular sheaths or stipules, gla- 

 brous in 3, but hispid in . Spikes mostly solitary, terminal, of a bright 

 rose-colour. This is the only perennial species of the Persicariu 

 group. 



6. P. Persicaria^ Linn. Spotted Persicaria. Flowers hex- 

 androus; styles forked; leaves lanceolate (often spotted); 

 spikes oblong, erect, their peduncles smooth ; stipules fringed. 

 Br. Fl. 1. p. 183. E. Fl v. ii. p. 233. E. Bot. t. 756. 



Moist ground and waste places, frequent. Fl. Aug. 0. Stems 

 erect, branched, one foot to two feet high. Spikes terminal and lateral, 

 dense, greenish, the tips of the flowers rose-coloured, Leaves nearly 

 sessile, glabrous. 



7. P. lapathifolium, Linn. Pale-flowered Persicaria. Flowers 

 hexandrous, with two distinct styles ; leaves ovato-lanceolate, 

 shortly petiolate ; spikes oblong, erect, their peduncles rough ; 

 stipules not fringed. Br. Fl. 1. p. 183. E. Fl. v. ii. p. 234. 

 E. Bot. t. 1382. 



Fields and dung-hills. In low moist ground near Cork ; Mr. J. 

 Drummond. Dung-hills near Belfast and other places. FL Aug. Q. 

 One foot or one foot and a half high. A very variable species. The 

 flowers are either pale green, almost white, or of a reddish tint. Spikes 

 dense, terminal and lateral. 



8. P. Hydropiper, Linn. Biting Persicaria. Flowers hex- 

 androus ; styles forked ; leaves lanceolate, waved and spotless ; 

 spikes lax, filiform, drooping; stem erect. Br. Fl. 1. p. 183. 

 E. Fl. v. ii. p. 235. E. Bot. t. 989. 



Sides of lakes and ditches, and damp places near farm-yards. Fl. 

 Aug. Sept. 0. One to two feet high or more, erect. Remarkable for 

 its slender, long-, more or less drooping spikes of distant, reddish flowers ; 

 they are lateral and terminal. 



9. P. minus, Huds. Small creeping Persicaria. Flowers 

 hexandrous; style undivided; leaves linear-lanceolate, plane, 

 very shortly petiolate ; spikes slender, erect ; stem rooting at 

 the base. Br. Fl. 1. p. 183. E. Fl. v. ii. p. 235. E. Bot. t. 

 1043. 



On gravelly, watery commons, not found near Dublin. Moist ground 

 near Cork ; Mr. J. Drummond. On the shore of Ballygowan Lake, 

 and Castle Blaney Lake, near Church-hill ; Mr. Templeton. Side of 

 the Bann, below Coleraine ; Mr. D. Moore, from whom I lately 



E E 



