from South Africa. Two besides P. Dawei have appeared 
in cultivation, namely P. coerulea and P. urticifolia, Hook., 
the latter of which is figured at t. 5365 of this work. The 
genus is distinguished from Plectranthus and Coleus by the 
much denser inflorescences and the spinescent calyx-teeth. 
P. Dawei is probably most nearly allied to P. afinis, Giirke, 
but that species is known at Kew from description alone ; 
Dr. Giirke’s species is understood to have sessile leaves—in 
P. Dawei they are usually distinctly petiolate. 
In cultivation P. Dawei forms a somewhat straggling shrub 
and calls for the same treatment as Coleus thyrsoideus, Baker, 
another Labiatefrom Uganda, which is more familiar in green- 
houses than the subject of our plate. But, while not difficult 
to grow, its flowers are apt to be injured at Kew by fogs. 
Descriprion.—Lerb; stems stout, 4-6 ft. high, laxly 
branched ; branches 4-angled, puberulous. Leaves narrow- 
lanceolate or linear-lanceolate, 5-12 in. long, 4-12 in. wide, 
considerably narrowed to the tip, sometimes almost caudate, 
gradually narrowed to the base, margin uniformly serrate, 
shortly pubescent on both surfaces, beset with rusty sessile 
glands beneath. Spikes terminal, elliptic-ovoid, 11-5 in. 
long, 14-1? in. across, dense, many-flowered. — Bracts 
spathulate-lanceolate, 1-3} in. long, incurved, ciliate with 
long white hairs. Calyz slightly accrescent; tube short, 
densely beset with sessile glands, its limb produced between 
the teeth into ciliate almost membranous lobules; teeth 
acicular, in flower } in., in fruit over $ in. long, sparingly 
shortly pubescent outside, ciliate at the base with long white 
hairs. Corolla deep blue, $-¢ in. long, sparingly shortly 
pubescent outside; lower half of the tube slender, near the 
middle suddenly deflexed and compressed-ventricose ; upper 
lip flat, somewhat cuneate, under 4 in. long and broad, 
shortly equally 4-lobed; lower lip compressed-navicular, 
twice as long as the upper lip, with an acuminate abruptly 
inflexed tip. Stamens nestling within the lower lip ; fila- 
ments sometimes all toothless or with 1-3 provided with a 
more or less pronounced tooth. Nutlets globose-lenticular ; 
surrounded below by the disk, which is very markedly 
swollen in front. : 
Fig. 1, portion of a leaf, showing the under surface; 2, flower; 3, hair; 
4, section of calyx, showing nutlets and disk ; 5, corolla laid open ; 6, a stamen 
with toothed filament ; 7, upper portion of style with stigma :—all enlarged. 
