60 NATURAL HISTORY OF PLANTS. 



tacle a little wider, lined by a 1 0-crenate glandular disk. Legume 

 linear compressed or subcylindrical thick, more or less divided 

 within between seeds by septa continuous with endocarp ; mesocarp 

 fleshy subpulpy inclehiscent ? Seeds transverse. — Small unarmed 

 trees; leaves 2-pinnate; leaflets en -jugate usually rather broad, 

 unequal at base, bearded on under surface at axils of veins; 

 petiolar gland considerable; jugal glands few; flowers in axillary 

 shortly-pedunculate racemes; pedicels short (Tropical America). — 

 See p. 23. 



4. Piptadenia Benth. — Flowers of Stryphnodendron. Legume 

 stipitate or subsessile, broadly linear, membranous or coriaceous, 

 2-valved, continuous and wanting pulp within ; valves entire ; 

 seeds compressed. — Trees or shrubs, unarmed or prickly ; leaves 

 2-pinnate ; leaflets small cc -jugate, or more rarely larger pauci- 

 jugate; petiolar and jugal glands rarely absent ; flowers in spikes 

 or racemes ; inflorescence either long cylindrical or globose, pedun- 

 culate, solitary axillary, or often panicled at extremities of twigs 

 (Tropical America and Africa). — See p. 24. 



5. Plathymenia Benth. — Flowers of Stryphnodendron. Legume 

 broadly-linear straight piano-compressed thin ; exocarp continuous 

 2-valved ; endocarp separating from it, lomentaceous, transversely 

 articulated ; segments persisting round single included transverse 

 seeds. — Trees or shrubs, unarmed ; leaves 2-pinnate ; leaflets and 

 pinnae usually go -jugate ; petiolar and jugal glands very rarely 

 absent ; flowers in cylindrical pedunculate, supra-axillary or panicled, 

 spikes or racemes ; axil of leaf often sheltering a gland or bud below 

 inflorescence (Brazil). — See p. 25. 



6. Xylia Benth. — Flowers (of Adenanflicra) 4-, 5-merous ; recep- 

 tacle obconical; stamens 8-10 ; anthers crowned by a minute stipi- 

 tate deciduous gland. Legume sessile broadly falciform piano- 

 compressed thick, woody 2-valved, spuriously septate within be- 

 tween transverse obovate compressed seeds. — An unarmed tree ; 

 leaves 2-pinnate; pinnae Ljugate; leaflets large paucijugate; 

 petiolar glands more or less prominent ; stipules minute deciduous ; 

 inflorescence capitate ; heads globose pedunculate axillary fascicled, 

 or racemose at extremities of branches (Tropical Asia). — See p. 25. 



