Flora of the Malayan Peninsula. 3 



Seeds faintly ridged on the dorsal surface, the ventral 



surface with a shallow groove .. .. ..11. P. imlycarpa. 



"Erect shrubs, usually small : — 

 Flowers 4-merous : — 



Leaves with a strong pale intra-marginal nerve . . 12. P. calocarpa. 



Flowers 5-merous : — 



Flowers shortly pedicellate, in dense globular cymules at 

 the ends of the long-peduncled branches of a terminal 

 umbellate cyme ; leaves deciduously puberulous, with 

 9 to 13 pairs of main-nerves; fruit -d in. long; seeds 

 4-ridged on the dorsal surface, slightly concave on the 

 ventral . . . . . . . . . . . . 13. P. multicapitulata. 



Flowers sub-sessile, in short condensed dichotomous sessile 

 axillary cymes ; leaves with scurfy pubescence and 8 to 11 

 pairs of main-nerves ; seeds 5-ridged on the dorsal and 

 broadly grooved on the ventral surface . . . . 14. P. tortilis. 



Flowers in a terminal umbellately branching cyme :— 

 Seeds with a single dorsal ridge, the ventral surface 

 plane : — 



Leaves quite glabrous : — 



Leaves 6 to 10 in. long ; main-nerves 12 to 15 



pairs . . . . . . . . 15. P. Griffithii. 



Leaves usually under 6 in. long, main-nerves 8 to 



10 pairs . . . . . . . . 16. P. ungulata. 



Leaves adpressed-pubescent, 6 to 12 in. long . . 17. P. Helferiana. 



Seeds with a single dorsal ridge, the ventral surface 

 with a groove ; leaves 5 to 8 in. long, quite glabrous, 

 main-nerves 7 to 8, rarely 10 pairs . . . . 18. P. montana. 



Seeds with 5 ridges on the dorsal surface, the ventual 

 surface plane: — 

 Leaves glabrous : — 

 Leaves oblong-elliptic to oblanceolate-elliptic, 3-5 

 to 8 in. long ; fruit -25 in. long . . . . 19. P. viridifiora. 



Leaves softly pubescent : — 

 Leaves elliptic to elliptic-oblong, the bases cuneate 

 rounded or cordate, 8'5 to 5 in. long ; fruit '25 to 

 •3 in. long . . . . . . . . 20. P. llircltiana. 



Leaves elliptic, the upper surface glabrous except 

 the midrib, 5 to 7 in. long ; fruit -45 in. long . . 21. P. fali^a. 

 Seeds 5-ridged on the dorsal surface and 2-grooved on 

 the ventral ; leaves glabrous on the upper surface, 

 their margins crenulate . . . . . . 22. P. fulvoidea. 



Seeds with 5 ridges on the dorsal surface and 1 ridge 



on the ventral ; leaves glabrous, usually oblanceolate 23. P. stijnilacea. 



Seeds 4-ridged on the dorsal surface, plane on the 



ventral : — 



Leaves elliptic, tapering equally to each end, 0- to 



10-nerved; calyx-lobes very long caudate-acuminate 24. P. Curtisii. 



Leaves obovate-oblong or obovate-oblanceolate, 10- to 



14-nerved ; calyx-lobes short, broad, blunt . . 25. P. rh'mocerotis . 



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