62. POLYGONACE^E. 143 



Var. terrestre. Le. narrow, rough, with short rigid hairs. 

 Frequent. Growing on dry places and moist banks. Hogganfield and Frank- 

 field. 



8. P. PERSICARIA, L. Spotted-Persicaria. Stems erect, 

 branched, 1 2 ft. high. Le. stalked, lanceolate, upper ones 

 sessile, often marked in the centre by a dark blotch, smooth or 

 sometimes hoary below. Ochreae loose, fringed with short glan- 

 dular bristles. Spikes terminal, oblong. Perianth smooth, red- 

 dish, sometimes green. Ped. never glandular. 



Common. Cultivated ground and damp places. (B) A. 7 10. 



9. P. LAPATHIFOLIUM, L. Pale-flowered Polygonum. Stem 

 ] 2 ft. high. Le. oblong-lanceolate, tapering into the footstalk, 

 glandular beneath. Lower ochreas not fringed, upper ones fringed, 

 without glands. Ped. and Peri, dotted with small glands. JB1. 

 pale green,- or slightly tinged with red. 



Frequent. Corn fields and waste places. (B) A. 7 8. Forth and Clyde Canal 

 banks; Cathcart; Gourock to Arran. 



10. P. HYDROPIPER, L. Biting '-Periscaria, Water -Pepper. 

 Stem 1 2 ft. high, often decumbent at the base. Le. lanceolate, 

 waved. Ochrese swollen, fringed with glandular hairs. Spikes 

 lax, at first drooping, narrow interrupted. Ped. smooth. Peri, 

 glandular. Ach. dotted. Taste hot and peppery. 



Common. Ditches and sides of ponds. (B) A. 89. Quarry below Partick ; 

 banks of Kelvin ; Clyde and Cart. 



11. P. MINUS, Huds. Stems 6 10 in. long, procumbent, 

 flowering branches erect. Le. linear-lanceolate, with short peti- 

 oles. Ochrea fringed, without glands. Spikes lax, slender, erect, 

 with few flowers. Peri, without glands. Ach. smooth. 



Rare. On the gravelly banks of the Black Loch, Mearns, Dr. Ross. (E) A. 8 9. 



2. RtfMEX. Dock, Sorrel. 



A. Plants not acid. 



1. R. HYDROLAPATHUM, Huds. Great Water-Dock Stems 

 erect, 3 5 ft. high. Le. lanceolate, acute; lower ones often 

 1J 2 ft. long. Panicle long, whorls crowded. Enlarged seg- 

 ments of the peri, ovate-triangular, entire, reticulate, each bearing 

 a tubercle. 



Very rare. " Borders of the lake at Woodhall," Patr. Lakes near Corehouse, 

 Mr. Dunlop. Between Fairlie and Largs. (E) P. 78. 



2. R. CRiSPUS, L. Curled Dock. Stems 2 3 ft. high, slightly 

 branched. Radical le. long, narrow, curled and crisped at the 

 edges, acute; upper ones getting gradually smaller. Whorls of 

 fl. crowded in a long narrow panicle. Enlarged segments of the 

 peri, broadly cordate, entire or crenulate, reticulate, only 1 bear- 

 ing an enlarged tubercle. 



Common. On roadsides and in pastures. (B) P. 68. 



