262 G. King — Materials fur a Flora of the Malayan Peninsula. [No. 1, 



Armed with spincscent stipules ; seeds arillate ; (pinnae 

 of leaves 1-jugate, their rachises gland-bearing ; leaflets 

 1-jngate; pods close-spiral, dehiscent along lower suture, 

 testa of distant seeds thin) ... ... ... 1. P. dulce. 



Unarmed ; seeds without arillus : — 



Pod indehiscent, (horse-shoe shaped), seeds (distant) with 

 a thick leathery testa ; (pinnae 1-jugate, their rachises 

 gland-bearing, leaflets glabrous 2-jugate) ... ... 2. P. confertum. 



Pods dehiscent, seeds with a thin crustaceous testa : — 

 Pods straight or slightly falcate, opening along both 

 sutures, valves thick, fleshy, seeds close-set, mutually 

 compressed ; (pinnae 1-jugate, their rachises gland- 

 bearing, leaflets glabrous 1-2-jugate) . ... 3. P. bubalinum. 



Pods spirally twisted, opening only along the lower 

 suture, valves coriaceous, seeds distant : — 



Pods deeply lobed between the seeds half-way down 

 to upper suture or further, dehiscing only opposite 

 the seeds; (pinnae 1-jugate, their rachises gland- 

 bearing, leaflets glabrous 2-3-jugate) ... ... 4. P. lobatum. 



Pods only faintly sinuate on lower suture between the 

 seeds, dehiscence along lower suture continuous : — 

 Pinnae 1-jugate without glands on their rachises ; 

 (leaflets glabrous) : — 



Pods large, '75 in. broad ; seeds somewhat com- 

 pressed, '6 in. long ; leaflets 2-jugate apex acute 5. P. nicobaricum. 

 Pods small, '4 in. broad ; seeds pisiform, 2 in. 

 across ; leaflets 3-4-jugate, apex caudate-acumi- 

 nate ... ... ... ... 6. P. microcarpum. 



Pinnae more than 1-jugate or, if casually 1-jugate 

 then with glands on their rachises ; (pods large) : — 

 Pods broad, 125 in. wide or more; leaflets very 

 large, glabrous ; (pinnae 2-jugate, distal much 

 exceeding the proximal casually absent pair) : — 

 Rachises of pinnae with glands between each 

 pair of leaflets ; flowers in dense many-fld. 

 heads *75 in. across ; leaflets shining on both 

 surfaces ; branches of panicle terete ... 7. P. afflne. 



Pachisesof pinnae with glands between bases of 

 terminal leaflets only ; flowers in few-fld. heads 

 *2 in. across ; leaflets dull beneath, branches of 

 panicle subcompressed ... ... 8. P. ellipticum. 



Pods narrow, '75 in. wideorless; leaflets medium 

 or small, pnberulous or pubescent beneath : — 

 Flowers large (5 in. long) ; pod long-stipitate, 

 seeds with long axis parallel to sutures ; 

 (pinnae 2-jugate or casually 1-jugate, leaflets 

 medium ; branches terete) ... ... 9. P. Eunstleri. 



Flowers small (under "25 in. long) ; pod short- * 

 stipitate, seeds with long axis transverse : — 



