VlTEX. 167 



17. a. Calyx 0.2—0.3 cM.; corolla (together with midlobe of 



lower lip) 0.7—1.1 cM 18. 



b. Calyx 0.6 cM. ; corolla (together with midlobe of lower 

 lip) 2 cM 12. V. pubescens p. 183. 



18. a. Corolla entirely glabrous within 19. 



b. Corolla more or less villous in the throat and near the 



insertion of the stamens 20. 



19. a. Leaflets membranous, scabrid-punctate above, densely 



velutinous beneath; terminal ones 10—22 by 472—10 

 cM.; petiolules 1—2 cM. . . 13. V. velutina p. 185. 

 b. Leaflets chartaceous, glabrous above or nearly so, with 

 small white scales, sparsely pubescent and glandular 

 beneath; terminal one 9—14 by 4—7 cM.; petiolules 

 IV2— 2V2 cM 14. V. sumatrana p. 186. 



20. a. Leaflets not or little pubescent beneath, glandular, nerves 



pubescent; calyx truncate or obscurely 5-toothed. 



15. V. heterophylla var. fi p. 189. 



b. Leaflets whitish tomentose beneath; calyx with 5 distinct 



teeth, ± 5-ribbed .... 16. V. Negundo p. 189. 



21. a. Leaves 3-foliolate 22. 



b. Leaves 5-foliolate 33. 



22. a. Calyx truncate or obscurely toothed . . . 23. 

 b. Calyx distinctly 5'toothed 24. 



23. a. Upper lip and lateral lobes of lo\yer lip of corolla 



tawny-pubescent within; inflorescence leafed below, 

 3 flowers together; leaves sometimes 5-foliolate. 



17. V. nitida p. 194. 



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



glabrous within 18. V. littoralis p. 194. 



24. a. Base of leaflets rounded, 6-I2V2 by 1.8-4.3 cM., 



petiolules 1 — 1 V2 cM. ; 12— 24-nervcd, coriaceous 



19. V. siamica p. 197. 

 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. 



