“I 
Sesamothamnus. | XCVII. PEDALINE& (STAPF). 56 
11. SESAMOTHAMNUS, Welw. ; Benth. et Hook. f. Gen. 
Pl. ii. 1058. 
Calyx small, 5-partite, oblique. Corolla-tube very long, cylindrical 
gently curved, with the back produced at the base into an often long 
slender spur ; limb spreading, large, obscurely bilabiate ; lobes 5, sub- 
orbicular, subequal. Stamens 4, subdidynamous, almost equal, inserted 
above the middle of the corolla-tube; posticous filaments shorter than 
the anticous or 0; anthers linear-oblong, parallel, dorsitixed. Disc 
fused with the base of the ovary, oblique and posticously gibbous. 
Ovary 2-celled ; cells divided nearly to the apex by a spurious septum ; 
ovules many, 1-seriate in each division. Fruit an oblong rigid capsule, 
laterally (at right angles to. the septum) compressed, loculicidal from 
the apex to the base. Seeds numerous, flat, transversely oblong, 
winged.—Shrubs with a short swollen bole, from which spring 
numerous erect stiff grey branches, or a small tree, armed with spread- 
ing spines (modified leaves). Foliage leaves in fascicles on arrested 
branchlets in the axils of the spines, deciduous. Flowers large, white 
or pale pink, in terminal and subterminal few-flowered short racemes. 
Species 5, endemic. 
Inner corolla-lobes long and densely fringed . 1. S. busseanus. 
Corolla-lobes not fringed. 
: C - . 2. S. Lugardit. 
Spur up to 24 lin. long . 
Spur 1-14 in. long. 
Corolla-tube glabrous apart from the mucilage 
glands. 
Posticous anthers sessile . : : . 8. S. benguellensis. 
Posticous filaments 3 lin. long « . 4, S. Smithiz. 
Corolla-tube long, hairy in the upper part 5. S. Erlangest. 
xxii. 114. A small tree or shrub 
1. S. busseanus, Lngl. Jahrb. x 
Branches ascending, covered 
12-15 ft. high, leafless when in flower. 
with grey bark, pale ferruginous when quite young; spines spreading, 
5-6 lin. long, up to 2} lin. thick at the base. Flowers on short greyish 
hairy branchlets, which bear 1 small lateral spine on each side at the 
base ; pedicels 23-3 lin. long. Calyx 1} lin. long ; segments triangular, 
acute, the posticous smaller, narrower and deflexed. Corolla white 
tube cylindric to beyond the middle then funnel-shaped, 13 in. long, 1} 
lin. wide ; spur very slender, 24-27 in. long, } lin. thick ; limb almost 
2 in. across; segments orbicular-ovate, the 4 inner fringed, 9-10 lin. 
in diam. (without the fringes); fringes very much dichotomously 
divided with a linear stalk or claw, exceeding the diameter of the lobes 
in length ; outermost lobes slightly smaller, naked. Filaments almost 
entirely adnate to the corolla-tube ; anthers 3 lin. long. - Capsule elliptic, 
apiculate, 24 in. long, 10 lin. broad, sparingly hairy, dark brown. 
Seeds obovate or subreniform, 3-3} lin. long; wings up to 24 lin. broad. 
German East Africa : Sa'anda, south of Lake Victoria, Fischer, 
Mozamb. Dist. 
454; Ugogo; near Ipala, Busse, 222. 
