22 



Materials for a Flora of the Malayan Peninsula. 



rarely 0, usually free and unequal. Stamens normally 10, perigynous 

 or almost hypogynous, rarely fewer by arrest, or indefinite ; filaments 

 free or variously combined ; anthers 2-celled, dehiscence almost always 

 longitudinal. Ovary free, style simple, cylindric, usually declinate ; 

 stigma capitate, terminal or oblique ; ovules l-oo on the venti-al suture. 

 Fruit usually dry, a pod splitting open along both sutures, sometimes 

 opening only along the ventral suture, sometimes continuous and in- 

 dehiscent, sometimes separating into one-seeded indehiscent segments. 

 Seeds usually exalbuminous ; cotyledons foliaceous or amygdaloid, with 

 a straight or an inflexed accumbent radicle. 



A very large order with three very natural suborders, including 

 altogether about 8,000 species. Of these suborders the Papilionacese 

 are cosmopolitan in distribution, the Gsesalpiniese and the Mimosede are 

 confined to the tropics and to warm temperate regions. 



Petals imbricate : — 



Calyx segments united above the level of the disc ; 

 the upper petal (standard) exterior (PAPiLioNACE-aE) : — 

 Stamens mon- or diadelphons : — 



Pods dehiscent along both sutures : — 



Leaves even-pinnate the rachis continued as a 

 tendril or bristle 



Leaves simple, digitate or odd-pinnate : — 

 Leaves simple sessile, or digitately 3-7-folio- 

 late ; stamens monadelphous, anthers dimor- 

 phous 



Leaves pinnately 3-foliolate, rarely (Clitoria) 

 5-7-foliolate or (Flemingia) fetioled l-£olio- 

 late or digitately 3-foliolate and then with 

 2-adelphous stamens ; when stamens 1-adel- 

 phous, the upper filament attached to the 

 others at its base 



Leaves 5-oo -foliolate, or if 1- 3-foliolate 

 (Tephrosia) with partially monadelphous sta- 

 mens and uniform anthers, or (Indigofera) 

 with 2-adelphous stamens, apiculate anthers 

 and basifixed hairs ; when stamens monadel- 

 phous the upper stamen free at its base 

 Pods indehiscent or opening along lower suture ; 

 (leaves, except Arachis and Smithia, odd-pinnate) :— 

 Pods not segmented, always quite indehi- 

 scent; leaves all odd'pinnate 

 Pods breaking into 1 -seeded indehiscent seg- 

 ments, or if dehiscent {Desmodium in part) 

 only opening along lower suture ; if not seg- 

 mented {Arachis) with leaves even-pinnate ; 

 (segment solitary in Phylacium) ... 

 Stamens free ... ... 



22 



I. VlClK^. 



II. GENISTK.aC. 



III. Phaseolk^. 



IV. Galege-S. 



V. Dalbergie-e. 



VI. 

 VII. 



Hedysarr-s. 



SoPHOBEJf. 



