LEHGUMINOS4-PAPILIONACES. 199 
of the beak distinguishes this little group from that of the Eypha- 
seolee, where the keel is spirally twisted. Thus nothing can come 
Physostigma venenosum (Calabar Bean). 
Fig. 154,—Pistil (8). 
Fia. 158. Fig. 155. 
Floriferous branch (3). Seed. 
nearer to a Kidney Bean than a Dolichos, and the two genera are 
often confounded in collections; but an examination of the keel is 
sufficient to remove all doubts. 
In the Galactiee the inflorescence remains the same as in the 
preceding types, the axis of the raceme bearing little thick very 
short knot-like secondary axes. The bracts are small and often 
caducous. The two upper lobes of the calyx are often united into 
one. The vexillary stamen remains free, and the style is glabrous. 
In this subseries or subtribe are placed the five genera Galactia, 
Grona, Cymbosema, Calopogonium, and Mastersia. 
The sub-series Hrythrinee contains eight genera: MHrythrina, 
Strongylodon, Rudolphia, Mucuna, Apios, Cochlianthus, Butea, and 
