A REVISION OF ACRIDOCARPUS 199 
allowance has to be made for individual variations in shape and 
size, and the young fruits are often very different in shape from the 
mature ones. 
Four more or less natural groups of species can be distinguished. 
The first group. consists of A. plagiopterus, A, Hirundo, and A. 
nd a 
A. macrocaly« differs from both of them in having less appressed 
hairs tee well as in the larger size of the calyx and leaves. 
aining groups have gS ied (or nearly erect) bracts 
and Frictoclar: the second ounded A. Smeathmanni, 
which has minute ovate bracts and Ssciahaalads the bracteoles being 
glandular outside. As a species, 4. Smeathmanni is characterized 
by a tendency towards aggregation of the racemes into panicles, by 
len 
C 
off, and by the thinly pre a obovate, very shortly and obtusely 
acuminate leaves. only other species in the second group is 
A. congolensis, which differs from A. Smeathmanni in having the 
inflorescence contracted into a corymb, and in the wing of the fruit 
being less narrowed towards the base. Both the species show a 
gradual transition from leaves into bracts. 
The third group is rather a large one, and is only provisional ; 
the species for the most part have subulate or lanceolate bracts 
bracteoles, and more or less coriaceous leaves, which have a rather 
the s 
the poe the length of the fits scence, the of the leaves, a 
the stoutness of the petioles. (B.) A. sie icus has more elon- 
ted racemes than l 
preceding, and longer and less crowded 
bracts and bracteoles; the leaves are obovate and (usually) apic 
late, and are of the same colour on both sur (C.) A. ugandensis 
Ces, : ug 
orescences than A. serene, and less coriaceous 
elliptie-oblong leaves; the bracts and bracteoles are shorter; the 
rhachis is slenderer and the flowers are ann crowded than in ‘sub- 
division A. I regard A. wgandensis as intermediate between A. 
(By am and A. zanzibaricus, and as perhaps nearer to the latter. 
th 
and atewne: sais oblandéee tian ont ‘sek are much aie sage 
the lower surface than on the upper. (E.) A. chloropterus differs 
from A. get in its elongated oblong leaves, which are pi 
at the base, and more or less pubescent on the lower 
(F.) A. saniipelctercs differs from all the other species ns ‘the 
