350 XCII. SCRUPHULARIACE& (HEMSLEY AND SKAN). _ [Jlysanthes. 
12. I. Schweinfurthii, Hngl. in Engl. Jahrb. xxiii. 504. A 
slender cespitose glabrous or sparingly pubescent herb, 4-8 in. high; 
stems erect, simple or branched at the base, quadrangular. Leaves 
linear, 24-5 lin. long (the uppermost smaller), rather thick and obtuse, 
entire. Flowers in a loose raceme; bracts 4-14 lin. long, unequal in 
the same pair; pedicels 2-6 lin. long, deflexed in fruit. Calyx 1} lin. 
long, 5-ribbed, pale green on the ribs and transparent between ; teeth 
} lin. long, lanceolate, acute, sparingly ciliate. Corolla about 44 lin. 
long, lilac ; tube only about } lin. broad ; upper lip deeply bifid, with 
narrow lobes ? lin. long. Staminodes oblong. Capsule fusiform, 
acute, 2} lin. long. 
Nile Land. Niamniam: Gumango Hill, Schweinfurth, 3889! 3931! by the 
Ibba River, near Nganye, Schweinfurth, 3991 ! 
Var, linearifolia, Engl.in Engl. Jahrb. xxiii. 504.—Leaves narrowly linear, acute. 
Calyx-teeth narrowly triangular, very acute. 
Upper Guinea. Sierra Leone, 4fzelius. 
I have not seen Afzelius’ plant. It should be compared with Z. Barteri. 
13. I, Barteri, Skan. Very closely resembles 7. Schweinfurthii, 
Engl., but the pedicels are usually scarcely 1 lin. long ; calyx-teeth 
acuminate; corolla 2-2} lin. long; upper lip bifid, with the teeth 
broad and only about + lin. long; staminodes short and ligulate, 
tapering somewhat at the apex ; capsule 14 lin. long. 
Upper Guinea. Northern Nigeria: Nupe; Jeba, on the River Quorra (Niger), 
Barter / 
30. DINTERA, Stapf in Mém. Herb. Boiss. xx. 27. 
Flowers cleistogamous. Calyx deeply 5- (rarely 6-) fid; segments 
oblong, obtuse. Corolla about as long as the calyx, ellipsoid ; tube 
sprinkled with sessile glands inside on the anticous part, closed 
by minute lips; upper lip outside, shortly 2-lobed ; lower lip 3-lobed. 
Stamens 2, anticous; filaments very short, glabrous, inserted above the 
middle of the corolla-tube; anther-cells unequal, ‘“ indehiscent or 
imperfectly indehiscent ” ; connective between the cells distinct ; staml- 
nodes none. Ovary ellipsoid-globose, 1-celled; style very short ; stigma 
somewhat thickened; placentas parietal, bifurcate, shield-shaped ; 
ovules many. Capsule orbicular-obovate, somewhat compressed on 
one side, septicidal at the apex or bursting irregularly. Seeds many, 
minute, oblong, more or less compressed, foveolate.-—A dwarf sub- 
cespitose quite glabrous aquatic submerged herb; stem broadly 4- 
winged. Leaves opposite, sessile, ovate. Flowers axillary, solitary, 
sessile, minute, ebracteate. 
An endemic monotypic genus allied to Bythophyton, Hook. f. 
1. D. pterocaulis, Stapf in Mém. Herb. Boiss. xx. 29, t. 1 fig A. 
Herb about 4 in. high; stems branched chiefly near the base, 
4-winged ; wings thin, more than } lin. broad; internodes up to 9 jin. 
