148 NATURAL HISTORY OF PLANTS. 



the New World only — namely, Hcematoaglon, Ggmnocladus, Cercidium, 

 Martia, Jpuleia, Palovea, Elisabeiha, Heterostemon, Broiunea, Epcrua, 

 Tachigali, Prioria, Zuccagnia, Pterogyne, Dimorphandra, and Schizo- 

 lobium and the other eight genera of the series Sclerolobiea. All the 

 remaining genera of the suborder, thirty-seven in number, are 

 natives of the Old World only. A large number of types are confined 

 to very small areas. Thus, Jcrocarpi/s, Wagatea, and Jmlierstia occupy 

 a very limited region of tropical Asia; and Pteroggne, Zuccagnia, 

 Pliyllocarpas, Dicorynia, Batesia, Jpuleia, Palovea, Elizabetha, Eperua, 

 Prioria, &c, a relatively small part of tropical America. In Australia 

 only are found Labicltea, Pctalosfyles, and BarMga ; while Storckietta 

 is altogether Oceanian. Detarium, Biclclotia, Cryptosejialum, Baikicea, 

 Daniella, Berlinia, Griffonia, Bisteiitonanllnix, and Buparquetia are 

 confined to tropical Africa ; and Baudouinia, CohiUea, Brandzeia to 

 Madagascar and the neighbouring islands. The number of species in 

 this suborder may be estimated at about eight hundred and fifty, of 

 which some five hundred are peculiar to the Old World, and three 

 hundred and fifty to the New. 



The subdivisions which it has been found necessary to make in 

 this group for convenience of study, are not the most natural imagin- 

 able. The limits of the tribes or series are hardly more precise and 

 absolute than those of the suborder itself. However, they are of 

 real value in practice; and hence, without blinding ourselves to their 

 artificial character, we have fully adopted the subdivisions proposed 

 by Bentham, which are characterized as follows : 



I. Cadie^;. — Flowers regular. Receptacle concave. Perianth 

 and androceum perigynous. Corolla contorted or imbricated; vexil- 

 lary petal internal, external, or overlapped on one edge and over- 

 lapping on the other. Androceum regular diplostenionous. Stamens 

 free. Seed exalbuminous ; radicle straight. Leaves imparipinnate 

 (1 genus). 



II. EucJESALPiNiEiE. — Flowers irregular or subregular. Calyx 

 dialysepalous. Corolla imbricated, the vexillary petal internal. 

 Androceum diplostenionous, rarely isostemonous. Stamens free; 

 anthers versatile. Gynasceum free, inserted in the bottom of the 

 receptacle. Leaves bipinnate, rarely pinnate or unifoliolate (14 

 genera). 



