Maferials fur a Flora of the Malayan Feninsida. 235 



SoBGEN. 2. TuBiCALTX Miq. Flor. Ind. Bat. I, 1081. Calyx sliallow- 

 ly cleft, the disc extending above the base, lower lobe shallow-cucullate. 



5. Mezoneuron sumatranum W. & A. Prodr. I, 283. A large 

 climber, branches glabrous, armed with a few dark short recurved 

 prickles. Leaves 1-1*5 feet long, pinnae 6-10, 8-12 in. long, leaflets 6-8, 

 alternate, rigidly subcoriaceous, obovate-oblong, emarginate and apicu- 

 late, base rounded very slightly unequal, 1-5-2-5 in. long, l-25-l'75 in. 

 wide, glabrous on both surfaces, dark-green above, paler beneath, second- 

 ary veins rather prominently closely reticulate beneath ; petiolules *2 in. 

 long. Inflorescence a terminal or axillary panicle of siniple or occa- 

 sionally branched racemes l'5-2 feet long, with terete thick glabrous 

 main rachis, single racemes 5-6 in. long ; pedicels close-set slender, 

 •25 long, curved. Calyx quite glabrous, leathery, anterior sepal oibicular 

 •25 in. long, twiCe as large as the others, tube compressed "5 in. long. 

 Corolla -35 in. wide, '5 in. long, of 5 subequal petals, oblong, narrowed 

 to the base, the standard reddish the other petals yellowish. Stamens 

 hardly exserted, declinate, glabrous, unequal. Ovary declinate stipilate 

 glabrous, 3-4-ovuled, stigma glabrous. Fod thin, 3-i in. long, 1'35 in. 

 wide (including posterior wing '25 in. wide), finely wide-reticulate, 

 distantly 3-4-seeded. Miq. Flor. Ind. Bat. I, 105 and I, 1081 ; Bak. in 

 Flor. Brit. Ind. II, 259. Csesalpinia sumatrana Roxb. Hort. Beng. 32 ; 

 Flor. Ind. II, 356; Wall. Cat. 5831 A only. 



Malacca; Griffith! Maingay 534! Perak; Thaipeng, Scortechini 

 67! Kwala, Scortechini 1766! Simpat, Sui% 3083 ! Bindings; Lumot, 

 Ridley 8f Curtis ! Singapore ; near Krangi, Ridley 2105 ! 6026 ! 



The great difference ia the appearance of the calyx no doubt justifies Dr. Miqnel's 

 proposal to treat this plant as the type of a distinct subgenus of Mezoneuron. 



57. Pterolobium R. Br. 



Robust woody prickly climbers. Leaves abruptly bipinnate. Flowers 

 in panicled racemes. Calyx deeply cleft, with the disc near the base, 

 the lobes imbricated, the lowest longer and more hooded than the others. 

 Pttals spreading, oblong and clawed equalling the calyx. Stamens 10, 

 free, declinate, little exserted; anthers oblong versatile. Ovary sessile, 

 1-ovuled ; style filiform, stigma small terminal. Pod indehiscent, sama- 

 roid with a large horny oblique terminal wing. Species 7 ; one African, 

 one Au-stralian, two Chinese, three South-Bast Asiatic. 



Racemes with thia angular glabrous rachis, laxly 20-30- 



fld., pedicels longer than calyx ... ... ... 1. P. niacropterum. 



Racemes with stout terete pnbernlous rachis, densely 



150-200-fld., pedicels not longer them calyx ... ... 2. P. densifiorum. 



1. Pterolobium macropterum Kurz, Journ. As. Soc. Beng. XLIT, 

 2. 71. A large climber, young branches sparsely pubescent, all parts 



236 



