196 XC. CONVOLVULACEE (BAKER AND RENDLE). | [pomua. 
petiole } in. long. Flowers solitary, on short pedicels, or up to 
4 on a short-peduncled raceme-like inflorescence; bracts linear to 
linear-lanceolate, acute, about 3 in. long. Sepals subequal, lanceo- 
late, long acute, 8-10 lin. long, densely silvery silky on the outside. 
Corolla 3-44 in. long; tube cylindrical; limb funnel-shaped, about 
14 in. in diam., scarcely iobed; tube and midpetaline areas of limb 
silky outside. Capsule globose, rather hairy. Seeds 3, 1 in. long and 
broad, clothed with long shining clear brown hairs.—J/. MJarlothii, Engl. 
Jahrb. x. 244. Rivea adenioides, Hallier f. in Engl. Jahrb. xviii. 16. 
Lower Guinea. German South-west Africa: Hereroland; Usaka, 3000 ft., 
Marloth, 1250. Amboland; Ombalambuenge, Rautanen, 160!  Korikas Flag, 
Belck, 21. Near Otyitambi, Giirich, 10; Liideritz, 116. 
Mozamb. Dist. British Central Africa: Lake Ngami, McCahe, 44! Northern 
Kalahari Desert; near Chukutsa Salt-pan, Zugard, 224! near Palapye, Lugard, 
265 ! 
Var. ovato-lanceolata, Hallier f, in Ann, Istit. Bot. Roma, vii. 235. Leaves 
ovate-lanceolate, gencrally acute, with somewhat obtuse base, up to 33 in. long by 13 
in. broad. 
Wile Land. Somaliland: Nogal, Robecchi-Bricchetti, 499. 
142. I. kituiensis, Vatke in Linnea, xliii. 511. Perennial, shrubby. 
Stems erect or climbing, hollow, up to } in. thick, pubescent, leaf-scars 
prominent. Leaves reniform-cordate, very obtuse, shortly apiculate, 
reaching nearly 6 in. in width, clothed with adpressed hairs beneath, 
similarly but sparsely hairy or glabrous above; petioles pubescent, 
varying in length, often as long as or longer than the leaves. Peduncles 
rigid, robust, terete, pubescent, up to 6 in. long, bearing a diffuse corym- 
bose dichasium ; flowers more or less crowded; bracts linear, acute, 
about } in. long, covered with white silky hairs like the sepals. Sepals 
tapering upwards, acute, unequal, the outer above } in. long. Corolla 
funnel-shaped, rose-purple, passing into white above, 2-3 in. long; 
thinly silky on the well-defined midpetaliue areas. Capsule } in. 10 
diam.; seeds long hairy.—Hallier f. in Engl. Jahrb. xxviii. 53. /: 
tambelensis, Baker in Kew Bulletin, 1894, 72. Rivea kituiensis, 
Hallier f. Engl. Jabrb. xviii. 156 (excluding plant from Usambara, 
Holst, 415); Dammer in Engl. Pfl. Ost-Afr. C. 334. 
Wile Land. British East Africa: Ukamba, Hildebrandt, 2759 ; Gregory! 
Kibwezi, Kassner, 709! 
Mozamb. Dist. German East Africa: Muansa, by Lake Victoria, Stuhl- 
mann, 4559; Usambara; Pangani, 2500 ft., Volkens, 460! Ugogo-Usagara, 
Trotha, 207. British Central Africa : Nyasaland; near Tambala, on the uppe? 
Shire River, Kirk ! 
A specimen collected in Kavirondo, Uganda, by Mr. Scott-Elliot (6991) may "® 
present a distinct species. The leaves are glabrescent, oblate, about 1} in. long by 
23 in. broad, the apex obscurely mucronulate, and the base subtruncate. The 
peduncles are less floriferous, with more congested flowers, and the sepals slightly 
broader at the base (14 lin.).—See Rendle in Journ. Bot. 1901, 57. 
143, I. nyikensis, Hallier f. in Engl. Jahrb. xxviii, 53. An erect 
(2?) shrub; branches robust, terete, hollow, covered like the petioles 
