131 



Galega is closely related to Cracca; Peteria is less closely so, w hile 

 neither Barhiera nor Kraunhia (Wisteria) should be placed in 

 the same tribe. The presence of two bractlets under the flower 

 would indicate that Barhiera is related to Seshania and Diphysa 

 among the Robinieae, although the structure of the pod is 

 different. Kraunhia, notwithstanding the terminal racemes, 

 is very closely related to Rohinia and should either be transferred 

 to the Robinieae or else form with the Asiatic genus Millettia 

 another subtribe. 



"The subtribe Robinieae is distinguished from Coliiteae and 

 AstragaJeae by its one-celled, two-valved, flattened not inflated 

 pods, but in the genus Diphysa, just referred to, the exocarp of 

 the pod is inflated and forms two lateral bladders, and in Homa- 

 lobiis and Kentrophyta, segregates of Astragalus, the pod has 

 all the characters assigned to Robinieae. Robinia, Olneya, Ben- 

 thamantha, Le?inea, WiUardia, Hebestigma, Gliricidia, and 

 Poitea form a very natural group, the true Robinieae, with truly 

 axillary racemes, flat, two-valved pods and odd-pinnate leaves. 

 Corynella, Notodon, and Sabina form also a group with similar 

 pods, but the leaves are abruptly pinnate and the flowers are 

 borne in fascicles on short leafless branches axillary to the 

 leaves of the preceding season. Coursetia combines characters 

 of the two groups, some species having odd-pinnate, others 

 abruptly pinnate leaves. Probably these could be segregated 

 into two genera. 



"The remaining genera of the Robinieae should be removed; 

 they have bractlets under the flowers and characters in the fruit 

 which do not suggest the fruit of Rohinia. Of these Diphysa 

 stands next to Robinia in the structure of the flowers and the 

 leaves which are odd-pinnate, but the fruit is very peculiar, the 

 pericarp separating into two layers, the exocarp which becomes 

 bladdery, and the endocarp which is close-fitting to the seeds 

 and constricted between them so that each seed is in a separate 

 chamber. This may constitute a subtribe to itself. The 

 rest, Sesbenia, Dauhentenia, Agati, and Glottidium form a natural 

 group with abruptly pinnate leaves, bractlets under the flowers 

 and the fruit with more or less distinct cross-partitions between 

 the seeds. 



