66o XLVii. LEGUMiNOS^. [Alhizzia. 



wide. Flower-heads numerous in panicles, white. Pods linear, 

 4 in. long, "5 in. wide, sutures thickened. Formerly much 

 planted as a shade for coffee, and sometimes persisting long 

 after the disappearance of the cultivation, occasionally repro- 

 ducing itself. Native of Malay islands. 



66. PITHECOLOBIUM, Mart. 



Trees medium-sized, usually unarmed. Leaves bipinnate; 

 leaflets even pinnate in few or many pairs. Flowers small, white 

 or yellowish in globose heads or small clusters, in short panicles, 

 pentamerous. Calyx campanulate or funnel-shaped, short-toothed. 

 Corolla funnel-shaped; petals connate in a tube for half or two- 

 thirds of their length. Stamens monadelphous, exsert; anthers 

 glandless. Ovary often stalked; style filiform. Stigma minute 

 capitate. Pod strap-shaped, curved to a circle or twisted, dehiscent 

 along the lower edge, very much twisted during dehiscence. Seeds 

 several, black, exallate. Species about loo. Mostly American, 

 I or 2 African, rest Asiatic. 



P. duke Benth. Hook. Lond. Jonrn. Bot. iii. 199; Prain, 

 I.e. 263. The Madras thorn. A shrub with stipular thorns, flower- 

 heads '5 in. through, white, pod turgid, twisted, dark red, has 

 often been planted as a hedge-plant in Singapore and Penang, 

 but does not become spontaneous. Native of America. 



Pods not twisted. 



Pod indehiscent; leaves bipinnate; pinnae with 



2 pairs of leaflets . . . . (i) P. COnfertum 



Pod splitting in 2, valves velvety . . • (2) P. bubalinum 



Pods twisted. 



Pinnae i to 4 pairs of leaflets. 



Pods large, deeply lobed, brown . . • (3) P. lobatum 



Pods not lobed, red. 



Pods large, i'5 in. across; leaflets large. 



Panicles large, lax glabrous; flowers 



small, cymose .... 



Panicles little-branched, hairy; flowers 



in heads ..... 



Pods under i in. across. 



Leaflets 3 pairs 4, in. long or less; flowers 



over 5 in. long, few in head 

 Leaflets 3 to 4 pairs, 4 to 6 in. long; 

 flowers -15 in. long; fruit 2 by -4 in. 

 Pinnae with 3 to 10 pairs of leaflets; 

 flowers pedicelled. 

 Branches strongly angled ; leaflets 

 •I in. wide ..... 

 Branches hardly angular; leaflets -75 

 in. wide ..... 



Pinnae with 15 to 20 pairs leaflets; 

 flowers sessile in pairs 



