182 XC. CONVOLVULACEH (BAKER AND RENDLE). | [pomea. 
Nile Land. Niamniam: Gumba, Schweinfurth, 3994. 
107. I. macrocalyx, Hallier f. in. Engl. Jahrb. xxviii. 51, not of 
Choisy. Stem densely clothed with short fine white pubescence. Leaf 
cordate-ovate, entire, apiculate, 7-8 in. long, 4? in. broad, densely 
clothed with short whitish soft pubescence. Flowers solitary ; peduncle 
strong, 9 lin. long. Calyx globose, 14 in. long, densely clothed with 
short soft whitish pubescence ; two outer sepals orbicular, quite hiding 
the others. Corolla 4} in. long; tube silky; limb with 5 silky ribs 
outside. Stamens and style half as long as the corolla. Fruit and seeds 
unknown.—Argyreia ? macrocalyxz, Baker in Kew Bulletin, 1894, 67. 
Mozamb. Dist. German East Africa: Unyamwezi, Msalala, Hannington! 
108. I. Hanningtoni, Rendle. Leaves elliptic with retuse base, 
apiculate, 2? in. long by 2} in. broad, densely clothed with soft whitish 
pubescence as in J. macrocalyx. Calyx glabrous, barely 1 in. long; 
two outer sepals ovate, blunt, hiding the three inner. Corolla 4} in. 
long; tube and midpetaline areas on limb silky. Stamens and style 
half as long as the corolla. Fruit and seeds unknown.—J. macrocaly”, 
var. decalvata, Hallier f. in Engl. Jahrb. xxviii. 51. <Argyre@ 
Hanningtoni, Baker in Kew Bulletin, 1894, 67. 
Mozamb. Dist. German East Africa; Usambara; Kisokwe, Hannington! 
Near I. macrocalyx, but distinguished by the shape of the leaf, and the shorter 
and glabrous calyx. 
109. I. dammeriana, De Wild. Htudes, Fl. Katanga, 115. Erect ; 
stems rigid, rather thick, glabrous. Leaves lanceolate, 3} to 4} in. 
long, 1-14 in. broad, strongly cuneiform at the base, rather sharply 
apiculate at the apex, margin entire or undulate, glabrous on both sur- 
faces, sometimes sparsely hairy on the nerves; petiole } in. long: 
Flowers solitary on stalks less than 4 in. long, bearing towards the 
middle a pair of large glabrous elliptic caducous bracts, nearly 1 1. 
long by half as broad, enveloping the young bud. Sepals about 1 m2. 
long, coriaceous, elliptic, glabrous, apex obtuse or apiculate. Corolla 
tubular-campanulate, 4 in. long; tube # in. in diam. Ovary glabrous. 
South Central. Congo Free State: Katanga; Lukafu, Verdick, 252. 
: é ; ave -ey leaves with 
Recalls 7. prismatosyphon, var. Buchneri, but differs in its narrower leaves W! 
cuneiform base, and smaller flowers and bracts. 
110. I. macrosiphon, Hallier f. in Engl. Jahrb. xxx. 387. : 
large subscandent shrub ; stems woody, terete, glabrous, the leaves a? 
flowers borne on short slender erect shoots springing from eee 
elongated stems from which the leaves have fallen. Leaves broadly 
ovate, up to 44 in. long by 31 in. broad, cuspidate, subtruncate - 
slightly cordate at the base, margin slightly repand, dentate, glabrous 
when mature, covered with white wool on the veins beneath when 
young; petiole as long as the blade. Peduncles up to 1 1. long; 
1-flowered ; bracts opposite, large, membranous, cymbiform, enclosing 
