Premna. 105 



b. Leaves entire or somewhat crenate or serrate towards 

 the apex only ... 28. 



27. a. Teeth of the calyx acute, large, as long as or longer 



than the tube; corolla villous within 



34. P. angustiflora p. 134. 



b. Calyx truncate or with 4 minute teeth; corolla glabrous 



within 20. P. cauliflora p. 124. 



28. a. Calyx truncate or indistinctly 4-toothed 29. 



b. Calyx very distinctly 4-toothed 31. 



29. a. Leaves 8— 257-2 by 6—14 cM.; petioles IV2— 3 cM.; 



corymbs 8—26 cM. long, 11—24 cM. in diam . . 30. 



b. Leaves 8 — 14 by 3 — 5 cM.; petioles 1— 2cM.; areolate 



beneath; corymbs reaching 10 cM. in length and in diam. 



21. P. areolata p. 124. 



30. a. Calyx truncate; stigma very shortly bifid 



22. P. Kunstleri p. 125. 



b. Calyx usually irregularly undulate; stigma long bifid; 



lobes capitate 44. P. macrophylla p. 148. 



31. a. Leaves glabrous on both sides, or pubescent only on the 



nerves or in their axils beneath 32. 



b. Leaves pubescent on one or both sides ..... 42. 



32. a. Leaves 10—30 by 5—20 cM.; petioles 1—8 cM. . 33. 

 b. Leaves3— 1 by 2 V2—5(— 7) cM.; petioles 0.5—3 cM. 39. 



33. a. Leaf-apex gradually acuminate, base broadly cordate or 



rounded, widest beneath the middle; calyx membranous, 

 with 4 sharp teeth . . . 23. P. adenosticta p. 126. 

 b. Leaf-apex abruptly acuminate or acute, (sometimes 

 gradually acuminate in P. integrifolia) ; widest across 

 the middle or above it; calyx usually coriaceous . 34. 



34. a. Axils of the nerves usually barbel late beneath 



42. P. integrifolia p. 140. 

 b. Axils of the nerves not barbellate beneath . . . .35. 



35. a. CoroUe-tube as long as the calyx, 0.1 — 0.15 cM. ; leaves 



obovate-oblong 24. P. oblongata p. 127. 



b. Corolla-tube longer than the calyx, 0.1 cM. or more 

 exserted 36. 



36. a. Leaves 10—30 by 10—15 cM.; petioles 2'/2— 3V2 cM.; 



calyx 2-lipped, the lips entire or 2-toothed; corolla-tube 



