POLYGONUM. 285 



scarcely covered by the perianth, styles connected half-way up at 

 length patent. E. B. 756. St. 1 2 feet high. L. more" or less 

 covered with hairs on both sides, sometimes woolly on the under 

 side, when it is P.incanum of authors. Ped. sometimes slightly 

 hairy, never glandular. Waste and damp ground. A. VI. X. 



7. P. mite (Schrank) ; spikes erect filiform interrupted, 1. lan- 

 ceolate slightly wavy, ochrece loose funnelshaped pilose strongly 

 fringed without glands, perianths without glands, nut (large) 

 compressed its faces roughish ovate acute rather shining convex, 

 stam. 5, styles connected half-way up " arrect." E. B. S. 2867. 

 St. 13 feet high, often much branched. Ochrese all fringed. 

 Spikes thickening upwards. Wet places. A. VIII. IX. E. 



8. P. Hydropiper (L.); spikes drooping filiform interrupted, 

 1. lanceolate wavy, ochrea ventricose glabrous fringed glandular, 

 perianths glandular, nut (large) compressed its faces ovate acute 

 rugose-punctate opaque convex, styles 2 nearly distinct. E. B. 

 989. St. 1 3 feet high. Upper ochrese funnelshaped, scarcely 

 fringed. Nut rounder than in P. mite. Spikes sometimes erect. 

 Wet places. A. VIII. IX. Water Pepper. 



9. P. minus (Huds.) ; spikes erect filiform slender lax, 1. linear- 

 lanceolate plane, ochrece close pilose all fringed without glands, 

 perianths without glands, nut (small) compressed its faces ovate 

 acute smooth shining convex, styles connected for at least half 

 their length. E. E. 1043. St. usually procumbent, diffuse. 

 Spikes ascending. Much smaller than P. Hydropiper, fl. and fr. 

 only half the size. Wet gravelly places. A. VIII. IX. 



*** Ochrece 2-lobed. Root fibrous. Nut triquetrous. Stam. 8. 

 Styles 3. FL axillary, 1 3 together. Avicularia. 



10. P. aviculare (L.) ; 1. lanceolate or elliptical stalked, ochrea 

 lanceolate acute with few distant simple veins at length torn, 

 nut striated with raised points opaque about equalling the pe- 

 rianth. E. B. 1252. L. usually blunt, sometimes acute. Fl. 

 either very distant and scattered, or so much collected as almost 

 to form a leafy spike. St. erect or procumbent. Ochreae some- 

 times long and much torn. Extremely variable. A form with 

 a long st. and fleshy broad 1. is sometimes found on the sea- 

 shore, which Reichenb. and Koch call P. littorale (Link). 

 Waste places. A. V. IX. Knot-grass. 



11. P. Raii (Bab.) j L elliptic-lanceolate flat, ochrete lanceo- 

 late acute with few distant simple veins at length torn, nut 

 smooth shining exceeding the perianth. E. B. S. 2805. P. Ro- 

 berti Hook., not Loisel. P. littorale Link ?, Gren. P. dubium 

 Deak. St. long, straggling, prostrate. L. bending towards the 

 stem. Resembling P. aviculare in habit, but P. maritimum in 



