Polygonum.| CIX. POLYGONACEH (BAKER AND WRIGHT). 113 
Upper Guinea. Sierra Leone: in a stagnant pond at Erimakuna, Scoft- 
Elliot, 4454! 
Nile Land. Jur: Seriba Ghattas, Schweinfurth, 2284! 
Also in South Africa and Tropical America. 
19. P. erythropus, Dammer in Engl. PA. Ost-Afr. C.170. Stem 
erect, bright red and glabrous in the lower part, nodose, pubescent in 
the flowering region. Leaves shortly petioled, long linear-lanceolate, 
attenuate towards both ends, 4-5 in. long, 4 in. broad, densely and 
minutely pilose above, but finally glabrous towards the centre, hairy 
principally on the veins beneath, margins revolute and setose-ciliate ; 
ochree obliquely truncate, slightly and adpressedly pilose, densely ciliate 
with bristles. Spikes cylindrical, 1-2 in. long, solitary or geminate, 
panicled; bracts obliquely truncate, obtuse, not glandular, setose- . 
ciliate, otherwise glabrous. Perianth glandular. Stamens 6, exserted. 
Styles 2. Nut lenticular, shining. 
Nile Land. Uganda: Evonde, Béhm, 34. 
20. P. glabrum, Willd. Sp. Pl. ii. 447. Perennial. Stems stout, 
erect, glabrous, 3-4 ft. long. Leaves oblong-lanceolate, shortly petioled, 
glabrous, or slightly hairy on the midrib beneath, narrowed gradually 
to the base, the lower sometimes 6-8 in. long, 14-2 in. broad at the 
middle ; ochre large, membranous, not ciliate. Spikes dense, oblong- 
cylindrical, 13-2 in, long; bracts not ciliate; peduncles glabrous, not 
glandular. Perianth pink, not glandular, 1} in. long. Stamens 6-8. 
Styles usually 2. Nut lenticular, orbicular, shorter than the perianth. 
—Wight, Ic. t. 1799; Meisn. in DC. Prodr. xiv. 114, and-in Mart. FI. 
Bras. v. i. 14; Aschers. in Schweinf. Beitr. Fl. Aethiop. 170; A. Rich. 
Tent. Fl. Abyss. ii. 226; Engl. Hochgebirgsfl. Trop. Afr. 201; Hook. 
f. Fl. Brit. Ind. v. 34; Gage in Rec. Bot. Surv. Ind. ii. 424. P. 
Hippopotami, Ehrenb. ex Meisn. in DC. Prodr. xiv. 121; Aschers. 
le. P. nodosum, Schweinf. in Bull. Herb. Boiss. iv. Append, ii. 155, not 
of Pers.—Schovanna-Modela~-Muccu, Rheede, Hort. Malab. xii. t. 77. 
Nile Land. Nubia: Dongola, Ehrenberg! Eritrea: Saganeiti, Schweinfurth 
& Riva, 828! Abyssinia: Begemeder; Gafat, Schimper, 1537! shore of Lake Tana, 
Schimper, 1542! Amba Sea, Schimper, 569! Kordofan, Kotschy, 38! 141! White 
Nile: Aba (Abu ?) Island, Schweinfurth, 992! banks of the Nile between Khartoum 
and Shendy, Bromfield, 126! Jur: Wau, Schweinfurth, 1702! 
Also in Tropical Asia and Tropical America. 
A specimen cultivated in Jamaica is said to have been received from Aburi, Gold 
Coast. 
Imperfectly known species. 
21. P. Schimperi, Vatke in Engl. Hochgebirgsfl. Trop. Afr. 202, 
name only. 
Wile Land. Abyssinia: Gafat, in marshy places at 8500 ft., Schimper, 1542. 
VOL, VI.—SECT. I I 
