104 Premna. 



or shortly acuminate apex; corolla subequally 4-lobed 



42. P. integrifolia p. 140. 



20. a. Teeth of the calyx broad aad short, indistinct ; base of 



the leaves decurrent; midlobe of the lower lip of the 

 corolla broader than the lateral lobes 



13. P. angustifolia p. 118. 

 b. Teeth of the calyx always large 21. 



21. a. Base of the leaves subobtuse, narrow; midlobe of the 



lower lip of the corolla narrower than the lateral lobes 



14. P. timoriana p. 119. 



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



broad; midlobe of the lower lip of the corolla broader 



than the lateral lobes . . 42. P. integrifolia p. 140. 



22. a. Leaves 4 — ^5-nerved, broadly elliptic, abruptly acuminate; 



base rounded or subcordate, 7 — 15 by 5'/2 — 9 cM.; 



petioles 2^2 — 5 cM.; glandular beneath, glabrous in the 



ti 15. P. ceramensis p. 120. 

 axils or the nerves ...■,-- r> .^ i ^ m 



( 16. P. punctulata p. 121. 



b. Leaves 5 — 6 nerved, narrower, not abruptly acuminate; 



base acute or rounded; axils of the nerves usually 



barbellate beneath 23. 



23. a. Leaves membranous, when young, chartaceous afterwards, 



elliptical or ovate, sometimes pubescent on both sides; 



corolla-tube pubescent without 17. P. divaricata p. 121. 



b. Leaves chartaceo-ccriaceous ; corolla-tube glabrous 



without 24. 



24. a. Lower bracts leafy, upper ones lanceolate; nerves glabrous 



18. P. perakensis p. 122. 

 b. All bracts linear; nerves generally pubescent . . .25. 



25. a. Branchlets, etc. with longitudinal lines of hairs which 



alternate at each node; corymbs often sympodiously 

 branched; corolla-tube 0.4 — 0.5 cM. long 



19. P. subglabra p. 123. 

 b. Branchlets, etc. with a continuous tomentum on all parts, 

 or subglabrous ; corymbs dichotomously branched ; corolla- 

 tube usually very short, 0.2 cM., sometimes reaching 

 0.3-0.4 cM 42. P. integrifoUa p. 140. 



26. a. Leaves coarsely crenate or serrate 27. 



