114 OCTANDRIA TRTGYNIA. Poly'gonum. 



half way up. Stamens six. Clusters lax, interrupted, 

 drooping. Stem erect. Leaves spear-shaped, wavy, 

 without spots. E. B. 989. C. 1. 26. 



Ditches, watery places. 



An. September. 



Discrim. Its slender, drooping, lax spikes, light green Is. spotless. 



Cat. whitish, tipped with red, glandular. From P. minus by its 



/. (of Hydropiper) waved, and not flat ; and by its divided style. 



Ls. tapering to a point, alternate. 



The acrid property of the plant, in an oil residing in the glan- 

 dular dots scattered over. Dyes wool yellow : diuretic. Anti- 

 odontalgic. 



P. minus. Small Creeping P. Styles two combined. 



Stamens six. Clusters lax, slender, nearly upright. 



Stem trailing at the base. Leaves linear -spear-shaped, 



flat. E. B. 1043. C. 1. 28. Persicaria pusilla 



repens. G. E. 446. 

 Watery commons, marshes. * * Otmoor. Sb. Port Meadow, 



opposite to Lower Woolvercot. Bx. 

 An. September. ' .- 



Smaller than P. Hydi'op. more trailing. Fl. without glandular 



dots. Ls. flat, not acrid. Stems nine inches to one f. Styles 



sometimes slightly cloven into three. 

 * * Styles three. 



P. Bistorta.^ Great Bistort, or Snake-weed, Stem 

 simple, with a single, spiked, cluster of flowers. 

 Leaves egg-shaped, wavy, running down into foot- 

 stalks. E. B. 509. C. 1. 22. Bistorta major, G. 

 E. 399. Baxter's plates, 5. 



Meadows * * Banks of the Isis beyond Iffley. Near Gosford 

 Bridge. Sb. Oseney Meadow. Mr. C. B.' Heivlett. 



Per. May. 



Stem about one f. and a half, leafy. Ls. veiny, fine green, foot- 

 stalks winged. Stalks of the stem Is. dilated, sheathing. Fl. 

 numerous, pink, each standing on a slender, rose-coloured stalk. 

 Bract, pair of membranous ones at the base. 



Root powerfully astringent. Young shoots eaten for greens. 

 Plant for tanning leather. 



P. aviculdre. Common Knot-grass. Flowers axillary. 

 Leaves elliptic-spear-shaped, rough-edged. Ribs of the 

 stipulas distant. Stem trailing, herbaceous. E. B. 

 1252. C. 1. 27. P. mas vulgare. G, E. 5^5. 



Waste and cultivated grounds. 



' Twice, and hvisted (root.) 



