— 32 — 



13. a. Leaves entire; corymbs 10-23 c.M. long, 9-25 c.M. wide 14 



b. Leaves usually serrate towards the apex; corymbs 5 1 / 2 -l3 c.M. long 



4-13 c.M. wide 15 



14. a, Calyx 2-lipped, one lip entire or 2-toothed, the other entire; corolla 



pubescent without ; leaves membranous. \ . . 5. P. sterculifolia. 

 b. Calyx 2-lipped, one lip entire or 3-toothed, the other 2-toothed; leaves 

 chartaceous 9. P. Peekelii. 



15. a. Calyx 2-lipped, one lip 1-toothed, the other entire or 2-toothed; corolla-tube 



0.2 c.M 10. P. Curranii. 



b. Calyx 2-lipped, one lip sometimes with 2 acute, usually with 2 obtuse teeth, 

 the other sometimes entire, usually with 3 obtuse teeth; corolla-tube 

 0.4-0.5 c.M. , 47. P. pubescens. 



16. a. Leases 2'/,-12 by 1 1 2 -5 7 c.M,; corymbs 6-13 c.M. long, 2</ 3 -(5-8) c.M. in 



diam.; peduncles 0.2-2.5 (—8) c.M 17 



b. Leaves 8'/ 2 -22 by 4-872 c.M.; corymbs 10-15 c.M. long, 7-20 c.M. in diam., 

 peduncles (0-) 2V 2 -7'/ 2 c.M . . . . .. 23 



17. a. Leaves 3-4 (-5) (in P. integrifoua sometimes more) -nerved; base sub- 



cordate, rounded or obtuse, sometimes subacute 18 



b. Leaves 5-8-nerved. base cuneate, decurrent. sometimes subobtuse . . .21 



18. a. Leaves usually barbellate in the axils of the nerves beneath; pairs of 



nerves 4-6 . 19 



b. Leaves not barbellate in the axils of the nerves beneath; pairs of nerves 

 3; corolla-lobes subequal 42. P. integrifolia. 



19. a, Leaves entirely glabrous on both sides, also on nerves and in theii axils 



beneath ;teeth of the lower lip of the calyx small, close to one another, some- 

 what elevated above the rest of the calyx. . . 11. P. borneensis. 

 b. Leaves usually pubescent on the nerves, always barbellate in their axils 

 beneath ; teeth of the lower lip of the calyx rather large and not close to one 

 another 20 



20. a. Leaves 2^i 2 -5'h (-7) by 1.5-3.3 (-4'/ 2 ) c.M., entire, 4-5 nerved; corolla 



distinctly 2-lipped; upper lip sometimes 2-lobed . . 12. P. congests 

 b. Leaves usually larger, often crenate towards the rounded or shortly acuminate 

 apex; corolla subequally 4-lobed . . . , 42. P. integrifolia 



21. a. Teeth of the calyx broad and short, indistinct; base of the leaves decurrent; 



midlobe of the lower lip of 1 he corolla broader than the lateral lebes , 



13. P. angustifolira 



b. Teeth of the calyx always large . . .22 



22. a. Base of the leaves subobtuse, narrow; midlobe of the lower lip of the corolla 



narrower than the lateral lobes 14. P. timoriana 



b. Base of the leaves cordate, truncate or subacute, usually broad; midlobe of 

 the lower lip of the corolla broader than the lateral lebes 42. P. integrifolia 



23. a. Leaves 4-5-nerved, broadly elliptic, abruptely acuminate; base rounded or 



subcordate, 7-15 by 5'/l'-9 c.M.; petioles 2'/2-5 c.M.; glandular beneath, gla- 

 brous in the axils of the nerver j 15. P. ceramensis 



( 16. P. punctulata 



b. Leaves 5-6-nerved, narrower, not abruptly acuminate; base acute or rounded; 

 axils of the nerves usually barbellate beneath 24 



24. a. Leaves membranous, when "young, chartaceous afterwards, elliptical or ovate, 



sometimes pubescent on both sides; corolla-tube pubescent without 



17. P, divaricata 



b. Leaves chartaceo-coriaceous; corolla-tube glabrous without . . . •. 25 



25. a. Lower bracts leafy, upper ones lanceolate; nerves glabrous 18. P. perakensis 

 b. All bracts linear; nerves generally pubescent . , 42. P. integrifolia 



