238 



Materials f 07- a Flora of the Malayan Peninsula. 



{Eumhnosese) ; (inflorescence capitate in Malayan 

 species) ; shrubs or under-shrubs with thin coriaceous 

 pods : — 



Pods straight with continuous valves, dehiscing 

 through sutures ... 



Pods slightly curved with usually segmented valves 

 and wich always indehiscent persistent sutures 

 Stamens indefinite often very numerous {Acaciese) ; 

 inflorescence spicate or capitate 

 Filaments more or less connate (Ingeas) ; (stamens usually 

 indefinite, rarely only 2-3-times as many as petals) : — 

 Pods (indehiscent) septate between the seeds : — 



Flowers large; petals adnate below to the staminal 

 tube, otherwise free ; pod woody turgid, sutures not 

 thickened 



Flowers small ; petals connate below in a tube ; pod 

 spongy or fleshy hardly turgid, the sutures thickened 

 Pods not septate between the seeds : — 

 Pods straight with thin valves : — 



Sutures thickened ; valves elastically revolntely 

 dehiscent from apex to base 



Sutures thin, pods indehiscent or if dehiscent the 

 dehiscence not elastic 

 Pods twisted with coriaceous valves, or if almost 

 straight (P. huhalinum) with fleshy valves, (sutures 

 thin) ... 



58. Parkia R. Br. 



63. Leuc^na. 



64. Mimosa. 



66. Acacia. 



66, Serianthrs. 



67. Enterolobium. 



68. Calliandra. 



69. Albizzia. 



70. PiTHECOLOBlUM. 



Tall, unarmed trees. Leaves bipinnate with usaallj very numerous 

 leaflets. Flowers in dense lorig-peduucled heads, eacli subtended by a 

 coriaceous persistent ligulate bract with a spoon^shaped tip. Calyx 

 tubular, shortly 5-cleft, lobes imbricate. Corolla tubular, cleft half-way 

 down, the segments subvalvate. Stamens 10, exserted, the filiform fila- 

 ments united in the lower part with each other and with the corolla- 

 tube ; anthers narrow, gland-tipped, the pollen cohering in irregular 

 masses. Ovary stalked, many-ovuled ; ^tjle filiform, stigma minute 

 capitate. Pod large, flat, strap-shaped, coriaceous, finally dehiscing. 

 Species about 10, cosmopolitan in the tropics, mostly American. 



Petioles with two glands ; heads subspherical (leaflets very 



narrow, acute, in 60-100 pairs) ... ... ... 1. P. liglandulosa. 



Petioles with one gland only ; heads turbinate or clavate : — 



Leaflets subfalcate, acute, in 40-80 pairs ... ... 2. 



Leaflets straight, obtuse or retuse in 20-35 pairs ... 3. 



1. Paukia biglandulosa W. & A. Prodr. 279. 

 Leaves 2-pinnate, main-rachis dowuy 12-15 in. long ; pinnae 20-40 pairs 

 subalternate, secondary rachises also downy about 3 in. long; leaflets 



238 



P. Roxhurghii. 

 P. spcciosa^ 



A lofty tree. 



