Polygonum.| IX. POLYGONACE& (BAKER AND WRIGH'). 111 
Dammer refers most of the Tropical African material to the variety sericeo- 
velutinum, Meisn. in Wall. Pl. As. Rar. iii. 55. 
15. P. sambesicum, Schuster in Bull, Herb. Boiss. 2” sér. viii. 
708. Stem erect, rather tall, thick, reddish, sulcate, thickened at the 
nodes, glabrous; internodes about 9 lin. long. Leaves 34-9 in. long, 
4-2 in. wide, long lanceolate, acuminate, tapering downwards, glabrous 
except for the slightly hairy under-surfaces of the nerves, dotted with 
golden or dark brown glands beneath; ochre naked, except sometimes 
for short slender hairs at the mouth; petiole 2-9 lin. long. Racemes 
panicled, 1-2} in. long, straight, rarely slightly flexuous; bracts turbi- 
nate, naked, with minute oil-glands or hairs at the mouth; pedicels 
13 lin. long, glabrous. Perianth rose-coloured, with many oil-glands ; 
nerves very firm, suberect, divaricate. Stamens 6. Style bipartite, 
shorter than the perianth. Nut 1 lin. long, 1 lin. in diam., compressed, 
with concave faces, shining. Cotyledons incumbent. 
Mozamb. Dist. Portuguese East Africa: by the Zambesi, Menyharth, 710. 
16. P. senegalense, Meisn. Monogr. Polyg. 54. Perennial. 
Stems robust, erect, glabrous, 4-5 ft. high. Leaves distinctly petioled, 
oblong-lanceolate, glabrous except on the midrib and margins, acute, 
narrowed very gradually to the base, the lower 6-8 in. long, 1}-2 in. 
broad at the middle; ochree large, truncate, not ciliate with bristles. 
Racemes few or several, cylindrical, moderately dense, 2-3 in. long; 
bracts broadly ovate, not fringed; pedicels 3-4-nate, finally about as 
long as the bract. Perianth pale pink, 14 lin. long. Stamens usually 7. 
Styles 2. Nut orbicular, with flattened faces, shining, nearly black.— 
Meisn. in DC. Prodr. xiv. 123; Aschers. in Schweinf. Beitr. FI. 
Aethiop. 171; Engl. Hochgebirgsfl. Trop. Afr. 202; Durand & Schinz, 
Etudes Fl. Congo, i. 236; Schweinf. in Bull. Herb. Boiss. iv. App. ii. 
156; Hiern in Cat. Afr. Pl. Welw. i. 904. P. macrocheton, Fresen. 
in Flora, 1838, 601; A. Rich. Tent. Fl. Abyss. ii. 225. P. nodosum, 
Pers. Syn. i. 440; Garcke in Peters, Reise Mossamb. Bot. 503; Engl. 
Hochgebirgsfl. Trop. Afr. 202; Hemsl. in Journ. Linn. Soc. xxvi. 343; 
Gage in Rec, Bot. Surv. Ind. ii. 396. P. lapathifolium, var. nodosum, 
Hook. f. Fl. Brit. Ind. v. 35. 
Upper Guinea. Senegal, Roger, 21! Déllinger! Gold Coast: Aburi, 
Johnson, 1080! Southern Nigeria: interior of Western Lagos, Rowland! Ogun 
River, Millen, 136! 
Nile Land. Eritrea: Ainsaba, Steudner, 672! Abyssinia: River Assam 
near Adoa, Schimper, 163! and without precise locality, Plowden ! Somaliland : 
Darra-as, Miss EB. Cole! and without precise locality, Mrs. Lort-Phillips! British 
East Africa: Lake Navaisha, Johnston ! Muka, Kaessner, 912! Kitui, in Ukamba, 
Hildebrandt, 2688 ' 
Lower Guinea. Island of St. Thomas, Don! Gaboon: bank of Como River, 
Bates, 460! Lower Congo, Burton! Angola: by the River Bengo, Welwitsch, 
5359! Mossamedes: pools at the banks of the River Bero, Welwitsch, 5358! 
Loanda, Gossweiler, 2208 ! 
