LEGUMINOS.E 397 



differ considerably amongst themselves. The cotyledons of 

 C. mimosoides represent the typical form of the Order in being 

 oblong, and those of C. Fistula (fig. 302) differ only in being 

 obovate-oblong. In both cases the primary leaves are abruptly 

 pinnate. A departure from the type is met with in Cassia 

 obovata (fig. 300), which has broadly obovate, retuse, tri- 

 nerved cotyledons. C. Absus is more in accordance with the 

 type of the suborder, having orbicular trinerved cotyledons 

 with a cordate base. C. circinata (fig. 299) differs from the 

 latter only in the cotyledons being entire. The leaves are 

 abruptly pinnate, the first having a single pair of leaflets, and 

 the next four two pairs. 



Tribe Bauliiniece. There is a considerable similarity 

 amongst the seedlings of the representative genus Bauhinia, 

 the chief differences being in minor details. The cotyledons 

 are broadly oblong or obovate-oblong, usually sessile and 

 three- to five-nerved, sometimes indistinctly. Bauhinia to- 

 mentosa (fig. 303) and B. Carronii are good representative 

 types. The shape of the cotyledons is due to that of the 

 seed, which is oblong or suborbicular and flattened, with the 

 contained cotyledons flat, but rather fleshy. Those of B. 

 Carronii show a tendency to become subterranean. The seeds 

 of this species measure 9-10*5 mm. long, 6-8 - 5 mm. wide, and 

 2'25-2 - 75 mm. thick, while those of B. tomentosa, having 

 decidedly aerial cotyledons, are smaller in every way. The 

 cotyledons of B. corymbosa and B. Hookeri agree in general 

 particulars with the above, but are rather fleshy and do not 

 readily unfold to the light. 



The leaves of B. Hookeri and B. Carronii are abruptly 

 pinnate from the first, and consist of one pair of obovate, 

 sessile leaflets, differing only from those that succeed them in 

 being smaller. Those of B. corymbosa and B. tomentosa 

 consist of one pair of leaflets united in a single bifid or bipar- 

 tite piece ; and in all or most cases the midrib projects as a 

 short bristle between the leaflets or lobes. The cotyledons of 

 Cercis Siliquastrum (fig. 304) are orbicular, entire, shortly 

 petiolate, and trinerved ; while the leaves are reniform, or 

 roundly cordate and five-nerved. 



Tribe Amherstiece. The only seedlings of this tribe which 



