LEGUMINOS Z-CHiSALPINIEA. 111 
concave receptacle lined by a glandular disk. The calyx is tubular’ 
and gamosepalous, divided above into five dentate teeth, valvate or 
imbricate in the bud. Usually it divides on anthesis into a certain 
number of parts marked off by 
longitudinal clefts, but it often 
opens into a single spathe-like 
piece owing to there being but 
one of these clefts, more or less 
perfect. The petals are of nearly 
equal size or unequal, as the 
vexillary petal may be larger or 
smaller; the rest differ in form 
or colour. The prefloration is 
imbricate, with the vexillary petal 
overlapped’ by the two lateral 
ones, and these again by the an- 
terior pair. The stamens are in 
two whorls, superposed to the se- 
pals and petals respectively ; the 
former set are the larger. Hach 
stamen consists of a filament and 
an introrse two-celled anther of 
longitudinal dehiscence.* The 
gyneceum is borne on a foot of 
Bauhinia (Casparia) porrecta. 
Fie. 85. 
Inflorescence (3). 
variable length, inserted either in the bottom of the receptacle as in 
Sclerolobie, or at a variable height inside its walls, though in this 
case anteriorly, not posteriorly as in that series. The one-celled ovary 
contains a variable number‘ of descending ovules on a placenta 
looking towards the vexillary petal.’ It ends in a style whose stig- 
1 Lined by a layer of glandular tissue, often 
very thin, but sometimes, though rarely, thick- 
ened, especially near the edges. 
2 Sometimes only one edge is overlapped. 
When the posterior sepal is absent, a single sepal 
occupies the place of the two posterior ones of 
the resupinate pentamerous flower, and to this it 
is that the placenta is superposed. 
3 The top of the filament is often bent in the 
bud. The anthers are usually versatile. 
4 Often indefinite. The ovules form two rows, 
and are descending and anatropous, or incom- 
pletely campylotropous with their micropyles up- 
wards and outwards. Certain species have only 
two or three ovules. 
5 While this relation remains unchanged, and 
remains what it is in Leguminose generally, the 
gyneceum when inserted excentrically on the 
walls of the receptacle, is here on the anterior side 
of the flower (see Adansonia, ix. fasc.7). Hence 
the cavity of the receptacle, which is sometimes 
well marked, is interposed between the placentary 
edge of the ovary and the vexillary petal; while 
in Amherstieg, on the contrary, the receptacular 
sac lies between the anterior petals and the 
gyneceum, which is inserted on its posterior wall. 
