XCII. ACANTHACER. es DSut 
Upper lip of corolla concave, compressed, 
helmet-shaped ; lower flat; stamens ex- 
serted ; anthers 2-celled, obtuse . . . . 13. DUVERNOIA. 
Upper lip of corolla concave, not helmet- 
shaped; lower convex, rugose; anthers 2- 
celled, the lower cell spurred apts . 14, Justicia. 
Upper lip of corolla narrow, 2-dentate ; "lower 
convex, reticulate ; anthers 2- celled, cells 
obtuse, subtransversely inserted one above 
the other obliquely. . . . 15, EcrernaNnTuvs. 
Corolla-tube long, straight or resupinate ; "lower 
lip with the medial lobe very large, the 
lateral linear ; bracts (except in Rhinacan- 
thus) much larger than the calyx. 
Tube of corolla resupinate. 
Capsules short, the septum in the ripe fruit 
breaking off from the valves. . . . . 16, Dicurprera. 
Capsules long, the septum persistent. . . 17. PERISTROPHE. 
Tube of corolla straight. 
Anthers 2-celled. 
Calyx-lobes cohering ; bracts large, 4- 
leaved ; flowers in heads . . 18. Hyporstes. 
Calyx 5- -parted ; ; corolla with a very long 
tube; bracts small, subulate; flowers 
panicled. . 20. RHINACANTHUS. 
Anthers 1-celled, connote ienoladeadl: sores 
not spiked. . . 19. Ramusia. 
Corolla-tube short, dilated ; "lower lip subequally 
3-lobed ; stamens 2 or 4; bracts small or 0. 
Anthers 1-celled, blunt ; flowers spiked . . 21. Rurrya. 
4, AsysTasIEm. Corolla funnel- or salver-shaped, 
with 2-labiate estivation. Stamens 4, 2 often 
sterile. 
Stamens 4, all fertile ; anther-cells mucronate at 
base. apaethiiee) Seals ten 22, HA SYSTASEAS 
Stamens 4, 2 sterile ; ‘anther- cells obtuse . . . 23. Mackaya. 
SuporpEr 1. Thunbergidez. (Gen. 1.) 
1. THUNBERGIA, Linn. f. 
Calyx minute, cup-like, truncate or many-toothed, concealed 
under 2 large, leafy, valvate bracts. Corolla between bell- 
and funnel-shaped, inflated in the throat, the limb subequally 
5-lobed, spreading. Stamens 4, didynamous; anthers erect, 
adnate, the cells parallel, mucronate at base. Stigma funnel- 
shaped, sub-2-labiate. Disk thick, circling the ovary. Cap- 
sule swollen at base, 2-celled, 2-4-seeded, tapering into a beak. 
Seeds subtended by a cup-like ring.— DC. Prod. xi. p. 54. 
Climbing or prostrate shrubs or herbs, Asiatic and African, Leaves 
mostly angular, often hairy. Flowers axillary, peduncled, solitary or race- 
mose, handsome, yellow blue or white, the throat often darker.—5 South 
African species,natives of the Eastern districts and Natal. 
