— 49 — 



19. a. Leaflets not or little pubescent beneath, glandular, nerves pubescent; calyx 



truncate or obscurely 5-toothed ... 13. V. heterophylla var j3 

 b. Leaflets whitish tomentose beneath; calyx with 5 distinct teeth, + 5-ribbed 

 14. V. negundo 



20. a. Leaves 3-foliolate 21 



b. Leaves 5-foliolate 33 



21. a. Calyx truncate or obscurely toothed . 22 



b. Calyx distinctly 5-toothed 24 



22. a. Leaflets white-verrucose above, glandular beneath . , 15. V. ceiebica 



b. Leaflets not white-verrucose above, not glandular beneath . . .23 



23. a. Upper lip and lateral lobes of lower lip of corolla tawny pubescent within; 



inflorescence leafed below, 3 flowers together; leaves sometimes 5-foliolate 

 16. V. nitida 



b. Upper lip and lateral lobes of lower lip of corolla glabrous within 



17. V. parviflora 



24. a. Base of leaflets rounded, 6-12'/ 2 by 1.8-4.3 c.M., petiolules l-l 1 ,, c.M.; 12-24- 



nerved, coriaceous 18. V. siamica 



b. Base of leaflets acute 25 



25. a. Proportion of length and breadth of terminal leaflet 1-2 26 



b. Proportion of length and breadth of terminal leaflet 3-5 29 



26. a. Inflorescence with 2 peduncles from each node 27 



b. Inflorescence with 4-6 peduncles from each node . 19. V. flabelliflora 



27. a. Calyx and corolla pubescent 28 



b. Calyx and corolla glabrous 20. V. secundiflora 



28. a. Leaflets extraordinarily densely glandular beneath, 3 or 5, pairs of nerves 



3-11; bracts minute 21. V. luteoglandulosa 



b. Leaflets rather sparsely glandular beneath, 3, pairs of nerves 6-8; biacts 

 lanceolate, obtuse, 0.8-3.2 c.M. long, 0.1-0.35 c.M. broad 22. V, glandulosa 



29. a. Calyx-lobes 0.1 c.M.; filaments stout, glandular and villous; leaflets coriaceous 



23. V. coriacea 



b. Calyx-lobes 0.05 c.M. or less 30 



30. a. Leaflets subsessile; calyx and corolla glabrous . 20. V, secundiflora 



b, Petiolule of terminal leaflet [ / 2 -2 1, 2 c.M.; calyx and corolla pubescent . . 31 



31. a. Terminal leaflet 7- 1 7 1 / 2 by 2.8-7 c.M., petiolule V2-L7 c.M.; calyx truncate 



or obscurely denticulate 17. V. parviflora 



b. Terminal leaflet 15V 2 -25 by 4.8-7 c.M., petiolule 1-2.7 c,M 32 



32. a. Caylx 0.1-0.15 c.M.; corolla-tube 0.3-0.4 c.M.; leaflets not acuminate 



, 24. V. lasiantha 



b. Calyx 0.2 c.M.; corolla-tube 0.5-0.6 c.M,; leaflets long acuminate . 



■ 25, V. longifolia 



33. a. Calyx truncate or nearly so 34 



b. Calyx distinctly 5-toothed .... 35 



34. a. Apex of leaflets obtuse or shortly and broadly acuminate . 16. V. nitida 

 b. Apex of leaflets long and narrowly caudate-acuminate . 15. V. ceiebica 



35. a. Corolla-tube 0.4-0.5 c.M., the 4 smaller lobes reaching V2-V4 of this length . 36 

 b. Corolla-tube 0.8 c.M., or smaller, the 4 smaller lobes reaching V 6 of this 



length; calyx denticulate 13. V. heterophylla 



36. a, Corolla villous within, as are filaments 37 



b. Corolla within, and filaments, glabrous, sometimes a little villous at the base 



of the midlobe of the lower corolla-lip . . . . 12. V. sumatrana 



37. a. Leaflets eglandular beneath 20. V. secundiflora 



b. Leaflets very densely glandular beneath . . 21. V luteoglandulosa 



38. a. Leaves 1-folioiate, cinereous, leaflets 12-18 by 2.7-4.7 c.M.; petioles 1-2 c.M. 



26. V. tetragona 



b. Leaves 3-5-foliolate, not cinereous 39 



