Leaves with pinnate nervation. 
Ovary 3-ridged... ... ... 1. P. triptera. 
Ovary 5-ridged. 
Leaves with 6 or 7 pairs of nerves... 2. P. Hookerinna. 
„ „ 3 or 4 „ ... 3. P. Kunstleri. 
Ovary 10-ridged ... ... 4. P. perakensis. 
Leaves boldly 5-nerved at the base, lateral 
nerves from the central nerve (midrib) 
3 pairs ; 7 to 14 in. loner > ovary 5-ridgod... 5. P. macrophylla. 
Leaves boldly ^-nerved at the base; the 
central nerve (midrib) with 1 or 2 pairs of 
lateral nerves : rarely more than 7 in. long. 
Ovary not visibly ridged ... ... 6. P. jioribunda. 
Ovary 8 or 9-ridged. 
Styles quite confluent ... ... 7. P. CnrtL*ii. 
„ free. . ... ... 8. P. eximia. 
Ovary 10-ridged. 
Leaves glabrous on both sui-faces... 9. P. Scortechinii. 
„ with a dense layer of minute 
adpressed hair on the uuder 
surface ... ... 10. P. Grifithii. 
Leaves boldly 3-nerved at the base, the 
central nerve (midrib) without lateral 
nerves, only 3 or 4 in. long ; ovary 5-ridged 11. P. strychnoidea. 
I. Pbntace triptera, Mast, in Hook. fil. PI. Br. Ind. i. 382. A 
large tree : yonng branches pubescent, speedily becoming glabrous, 
their bark dark-coloured. Leave* ovate to ovato-rotund, sometimes 
ovate-oblong, sub-acute or shortly and bluntly acuminate, the margins 
undulate, the base rounded; upper surface glabrous, the lower pale, 
minutely scaly ; basal nerves one or two pairs ; lateral 5 to 7 pairs, as- 
cending, straight ; length 4 to 5 in., breadth 2 to 2 1 75 in. ; petiole *6 to 
12 in. thickened towards the apex, pubescent. Panicles terminal and 
axillary, 6 to 8 in. long, with short many-flowered branches minutely 
and softly stellate-tomentose. Flowers nearly "2 in. long, on pedicels 
shorter than the calyx. Calyx with 5 lanceolate teeth, tomentose outside. 
Petals spathulate-oblong, obtuse. Stamens 5-dolphous, longer than the 
style. Staminodes subulate, shorter than the stamens. Ovary densely 
tomentose, shortly 3- winged. Style filiform, glabrous, bent at the 
apex. Fruit oblong, narrow, '6 in. long, with 3 spreading membranous 
rounded wings *5 in. broad. 
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