1897.] G. King — Materials for a Flora of the Malayan Peninsula. 235 



Subgen. 2. Tubicalyx Miq. Flor. Ind. Bat. I, 1081. Calyx shall ow- 

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



5. Mezoneukon sumatra-Num W. & A. Prodr. I, 283. A large 

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

 prickles. Leaves 1-1 '5 feefc 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, \'h-2>'h in. long, 1 '25-1*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 simple or occa- 

 sionally branched racemes 1*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 orbicular 

 '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 stipitate 

 glabrous, 3-4-ovuled, stigma glabrous. Pod thin, 3-4 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. Cse&alpinia sumatrana Roxb. Horfc. Beng. 32; 

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



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

 67! Kwala, Scorteehini 1766! Simpat, Ridley 3083 ! Bindings; Lumot, 

 Ridley Sf Curtis ! Singapore ; near Krangi, Ridley 2105 ! 6026 ! 



The great difference in the appearance of the calyx no doubt justifies Dr. Miquel's 

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



57. Pterolobidm R. Br. 



Robust woody prickly climbers. Leaves abruptly bi pinnate. 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. 

 Petals spreading, oblong and clawed equalling the calyx. Stamms 10, 

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

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

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

 one Australian, two Chinese, three South-East Asiatic. 



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



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



Racemes with stout terete puberulous rachis, densely 



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



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

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



