98 Gr. King — Materials for a Flora of the Malayan Peninsula. [No. 1, 



Rnchis and branches of panicle glabrous or sparsely 

 pubernlous ; pod (where known) glabrous : — 

 Flowers white in laxly-branching panicles : — 



Leaves with 10 pairs of prominent spreading 



secondary nerves; ovules 4 ... ... 9. D. afiinis.' 



Leaves with 4-5 pairs of ascending fa'nt secondary 



nerves; ovules 2-3 ... ... ... 10. D.floribunda. 



Flowers pink infastigiately-branching pnnicles (leaves 

 with numerous spreading but not prominent secon- 

 dary nerves ; ovules 2 ; pod glabrous) ... ... 11. D. amcena. 



Standard 2-callose at base (§ Paraderris) : — 



Leave and petals pubescent ... ... ... 12. D. elliptica. 



Leaves and petals glabrous ... ... ... 13. D. malaccensis. 



§ 1. Aganope. Robust climbers with large leaflets ; flowers usually 

 rather small in ample thyrsoid panicles, the nodes not produced into 

 stalks ; upper stamen quite free from the others down to the base ; base 

 of vexillum without callosities ; pod winged down one or both sutures. 



1. Derris sinuata Thwaites Enum. PI. Zeylan. 93. A strong 

 climber with dark-brown glabrous branches. Leaves 10-16 in. long ; 

 leaflets dark-green 5-7, coriaceous ovate- to ovate-oblong or elliptic, 

 shortly cuspidate or subobtuse base rounded or widely deltoid, 4-5 in. 

 long, 2-3 in. wide, glabrous on both surfaces, lateral nerves 5-7 pairs 

 spreading hardly visible, rachis 6-12 in. long glabrous as are the petio- 

 lules *25 in. long. Flowers in ample thyrsoid terminal, or terminal and 

 axillary panicles 8-16 in. long, branches 1*5-3 in. long at intervals of 

 *5-l in. their nodes not tumid nor produced into stalks, pedicels '1 in. 

 long (in fruit lengthening to '25-+'3 in.), stout, arranged usually in sub- 

 opposite pairs *2-*25 in. apart, occasionally all scattered, rachis and 

 its branches glabrescent, pedicels adpressed rusty-puberulous, with 

 small decidous bract at base and 2 very minute triangular deciduous 

 bracteoles close to calyx. Calyx wide-campanulate thinly silky "2 in. 

 long, with ripe fruit *25 in. in diam. circumscissile at base. Corolla '6 

 in., standard erect orbicular *5 in. wide, with ecallose cordate base. 

 Stamens 2-adelphous, the vexillary filament free from the rest to the 

 base. Ovary pubescent, ovules 5-7. Pod strap-shaped, coriaceous, dis- 

 tinctly reticulated, 2*5-8 in. long, 1*5 in. wide, upper suture narrowly 

 winged, wing never exceeding *1 in. in breadth, usually much less and 

 sometimes barely perceptible, always more or less sinuate between the 

 ]-5 seeds. Benth. Journ. Linn. Soc. IV, Suppl. 113 ; Bak. in Flor. 

 Brit. Ind. II, 246. Pongamia sinuata Wall. Cat. 5911. Pongamia 

 grandifolia Grah. in Wall. Cat. 5882, not of Zoll. & Mor. 



Perak ; on banks of tidal rivers, Kunstler 179 ! Scortechini ! 

 Malacca; river banks, Griffith 1773! Maingay 551! Distrib. Ceylon; 

 Sundribuns : Coasts of Indo-China and the Malay Archipelago. 



