Premna. 103 



b. Leaves usually serrate towards the apex; corymbs 5'/., — 

 13 cM. long, 4—13 cM. wide 14. 



13. a. Calyx 2-lipped, one lip entire or 2-toothed, the other 



entire; corolla pubescent without; leaves membranous 



5. P. sterculifolia p. 113. 



b. Calyx 2-lippcd, one lip entire or 3-toothed, the other 2- 



toothed; leaves chartaceous . . 8. P. Peekelii p. 115. 



14. a. Calyx 2-lipped, one lip 1-toothed, the other entire or 



2-toothed; corolla-tube 0.2 cM. 9. P. Curranii p. 116. 

 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 cM. 



48. P. pubescens p. 152. 



15. a. Leaves2V2—12by IV2 — 5.7 cM.; corymbs 6— 13 cM. long, 



2'/,— (5— 8) cM. in diam.; peduncles 0.2— 2.5(— 8) cM. 16. 



b. Leaves 87. -22 by 4— 8V2 cM.; corymbs 10—15 cM. 



long, 7—20 cM. in diam., peduncles (0— )27,— 7V2 cM. 22. 



16. a. Leaves 3 — 4{ — 5) (in P. integrifolia sometimes more) 



-nerved; base subcordate, rounded or obtuse, sometimes 



subacute .... 17. 



b. Leaves 5^ — 8-nerved, base cuneate, decurrent. sometimes 

 subobtuse 20. 



17. a. Leaves usually barbellate in the axils of the nerves 



beneath; pairs of nerves i — 6 18. 



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

 paits of nerves 3; corolla-lobes subequal 



10. P. corymbosa p. 117. 



18. a. Leaves entirely glabrous on both sides, also on nerves 



and in their axils beneath; teeth of the lower lip of the 

 calyx small, close to one another, somewhat elevated 

 above the rest of the calyx . 11. P. borneensis p. 117. 



b. Leaves usually pubescent on the nerves, always barbel- 

 late in their axils beneath ; teeth of the lower lip of the 

 calyx rather large and not close to one another . .19. 

 19.. a. Leaves 2'/2— SVsC- 7) by 1.5— 3.3(— 4V2) cM., entire. 

 4— 5-nerved; corolla distinctly 2-lipped; upper lip 

 sometimes 2-lobed .... 12. P. congesta p. 118. 



b. Leaves usually larger, often crenate towards the rounded 



