Polygonum.'] cix. polygonace^ (baker and wright). Ill 



Dammer refers most of the Tropical African material to the variety sericeo- 

 veluiinum, Meisn. in Wall. Fl. As. Ear. iii. 55. 



15. P. sambesicum, Schuster- in Bull. Herb. Boiss. 2*"^ ser. viii. 

 708. Stem erect, rather tall, thick, reddish, sulcate, thickened at the 

 nodes, glabrous; internodes about 9 lin. long. Leaves ^>J-9 in. long, 

 J-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 ; ochrese naked, except sometimes 

 for short slender hairs at the mouth; petiole 2-9 lin. long. Racemes 

 panicled, 1-2J in. long, straight, rarely slightly flexuous ; bracts turbi- 

 nate, naked, with minute oil-glands or hairs at the mouth ; pedicels 

 1 i lin. long, glabrous. Perianth rose-coloured, with many oil-glands ; 

 nerves very firm, suberect, divaricate. Stamens 6. Style bipartite, 

 shorter than the perianth. Nut IJ lin. long, 1 lin. in diam., compressed, 

 with concave faces, shining. Cotyledons incumbent. 



Mozamb. Dlst. Portuj^uesc East Africa: by the Zambesi, Menyharth, 710. 



IG. 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, lJ-2 in. 

 broad at the middle ; ochrese large, truncate, not ciliate with bristles. 

 Racemes few or several, cylindrical, moderately dense, 2-8 in. long ; 

 bracts broadly ovate, not fringed ; pedicels 8-4-nate, finally about as 

 long as the bract. Perianth pale pink, \\ lin. long. Stamens usually 7. 

 Styles 2. Nut orbicular, with flattened faces, shining, nearly black. — 

 Meisn. in DC. Prodr. xiv. 128; Aschers. in Schweinf. Beitr. Fl. 

 Aethiop. 171 ; Engl. Hochgebirgsfl. Trop. Afr. 202; Durand k Schinz, 

 Etudes Fl. Congo, i. 286 ; Schweinf. in Bull. Herb. Boiss. iv. App. ii. 

 156; Hiern in Cat. Afr. PI. Welw. i. 904. 1\ macrochceton, Fresen. 

 in Flora, 1888, 601 ; A. Rich. Tent. Fl. Abyss, ii. 225. P. nodosum, 

 Pers. Syn. i. 440 ; Garcke in Peters, Reise Mossamb. Bot. 508 ; Engh 

 Hochgebirgsfl. Trop. Afr. 202 ; Hemsl. in Journ. Linn. Soc. xxvi. 848 ; 

 Gage in Rec, Bot. Surv. Ind. ii. 896. P. lapathifolium, var. nodoswn, 

 Hook. f. Fl. Brit. Ind. v. 85. 



Upper Guinea. Senegal, Roger, 21! Bollinger ! Gold Coast: Aburi, 

 Johnson, \{)^^\ Southern Nigeria: interior of Western La^-os, Rowland! Ogiiu 

 Kiver, Millen, 136 ! 



Ifile Ziand. Eritrea: Ainsaha, Steudner, 072! Abyssinia: River Assam 

 near Adoa, *Wiiw?/>er, 163 ! and without precise locality, Plowden ! Somaliland : 

 Darra-as, Miss E. Cole ! and without i)recise locality, Mrs. Lcrt - Phillips ! British 

 East Africa: Lake Navaisha, Johnslon ! Muka, Kaessner, 912! Kitui, in Ukamba, 

 midehrandt, 2688 ! 



Xiower Guinea. Ishnul of St. Thomas, Don I Gaboon : bink of Como River, 

 Bates^ 400! Lower Congo, Burton! Aiiiiohi: by the River Jiengo, H'el/vilsch, 

 5359! Mossamedes: pools at the banks of the River Hero, Welicitsch, 0358! 

 Loanda, Gossweiler, 220b ! 



