Lboza.| LABIATA: (Brown). 299 
minutely bifid or emarginate at the apex, or unequally or subequally 
5-lobed, 5-nerved ; dorsal lobe ovate to suborbicular, not decurrent 
on the tube, usually not or but slightly larger than the other lobes. 
Corolla very small, similar in both sexes, but larger in the male ; 
tube funnel-shaped ; limb subequally or unequally 5- (rarely 4-) lobed ; 
lobes more or less spreading, flat or slightly concave, the lower slightly 
larger than the others. Stamens in the male flower 4, free, separate, 
not contiguous in pairs and apparently not all directed towards the 
lower lobe, exserted; anthers reniform, dorsifixed, one-celled, 
opening longitudinally and forming a peltate flattish disk or with 
the margins recurved nearly or quite to the filament ; in the female 
flower 0 or 4 and abortive. Disk unequally 4-lobed or minute. 
Ovary 4-lobed, apparently perfect in the male flowers, but never 
producing seed ; style not or but slightly exserted and subentire or 
bifid at the apex in the male, much exserted, with linear or oblong- 
linear spreading stigmas in the female. Nutlets erect, oblong or 
ovoid and dorsally compressed, obtuse or acute. 
Stout perennial herbs, sometimes (at least as to dried specimens) nearly leafless 
at the time of flowering; leaves opposite, petiolate, ovate or cordate, toothed ; 
flowers very small, in large terminal much-branched panicles, with the ultimate 
branches laxly or densely spike-like (termed spikes in the descriptions) and the 
separate whorls 6-flowered. 
Distr1B. Species more than 12, the others in Tropical Africa. 
The plants belonging to this genus have hitherto been referred to Moschosma, 
but they differ entirely from that genus in habit, calyx and corolla, and in having 
unisexual flowers, with the sexes on different plants. The small size and form of 
the corolla and the arrangement and spread of the stamens is somewhat like that 
ot Mentha, next which I consider this genus should be placed. The generic name 
Tboza is that by which I. riparia is known to the Kaffirs. 
The differential characters of the species, although in most cases readily 
distinguishable to the eye, are not easily expressed in words, as many of them, 
fey are very evident upon dissection, are such as cannot be used for purposes of 
a key. 
Leaves bullate-rugose above, densely tomentose beneath ; 
male spikes long, dense ; calyx 5-lobed, tomentose (5) Barbere. 
Leaves not rugose above; calyx 3-lobed, lateral lobes 
acutely bifid or emarginate at the apex : 
Male or falsely hermaphrodite flowers in dense spikes 
1-3 in. long; hairs on the underside of the leaves 
chorter than the thickness of the very prominent 
veins on which they stand ... : a ... (4) brevispicata. 
Male or falsely hermaphrodite flowers in somewhat lax 
spikes 1-3 in. long, with the whorls distinctly 
separated ; female spikes dense, 4-1in. long ; hairs 
on the underside of the leaves longer than the 
thickness of the veins on which they stand : 
Underside of leaves thinly to thickly pubescent, but 
the hairs not hiding the surface between the 
veins : 
Leaves (except sometimes on the panicle) notched 
at the base; tertiary veins not prominent 
beneath ; male flower-whorls 13-3, female 
4-1 lin. apart ... a3 “ us ... (1) riparia. 
