LEGUMINOS#-CAISALPINIEA. 79 
mounted by a style whose apex is hollowed out, with stigmatic 
papilla surrounding its aperture. The ovary contains only two 
ovules or rarely more. The fruit is a membranous pod, externally 
resembling that of Mezoneurum ; it dehisces in a very peculiar way, 
not down its edges, but along the line which would correspond to 
Hematoxylon campechianwm (Logwood-tree). 
Fie. 49. 
Habit (3). 
the junction of the wing and the body of the pod in Mezoneurum. 
It contains one or few seeds; the seed is flattened and much elon- 
gated transversely, and is attached by the middle of its ventral edge. 
It contains an embryo whose long axis is also transverse, and pos- 
sesses a cylindrical slightly curved radicle, a gemmule with imbri- 
cated leaves and two very peculiar cotyledons which are very short 
and‘ broad, each divided into two lobes which are folded together, 
and reflexed where they come in contact with the radicle. The 
only known species of this genus is the Logwood-tree (Fr., Bois de 
