Flora of the Malayan Peninsula. 811 



Main nerves of leaves 5 to 6 pairs ; leaves obtuse 

 or very shortly acute or acuminate at apex : — 



Leaves ovate or elliptic, membrano-chartaceous . . 6. P. divaricata. 

 Leaves obovate or orbicular, chartaceous . . 7. P. trichostoma. 



Leaves elliptic or elliptic lanceolate, coriaceo- 

 chartaceous . . . . . . , . 8. P. perakensis. 



Main nerves of leaves 4 to 5 pairs, leaves broadly 



elliptic .. .. .. ..9. P.punctulata. 



Corymbs compact : — 



Corymbs 3 in. in diara. ; leaves membranous, ovate- 

 acuminate, coi'date or truncate at base, yellowisb- 

 brown when dry . . . . . . 10. P. cordifolia. 



Corymbs 4 to 5 in. in diam. ; leaves coriaceous, 



elliptic or elliptic-lanceolate, shortly acuminate at 



apex, attenuate at base; reddish-brown when dry 11. P. Wrayi. 



Corymbs Sin. in diam. ; leaves membranous, broadly 



ovate, acuminate at apex, truncate or cordate at 



base ; reddish-brown when dry. . . . . 12. P. stereulifolia. 



Lower lip of calyx 2-lobed, calyx-tube subquadrangular; 

 leaves under 3 in. long ; corymbs rather small ; corolla-tube 

 slender . . . . . . . . . . 13. P. Ridleyi. 



Calyx not 2-lipped : — 



Calyx truncate or very obscurely lobed ; leaves coriaceous, 



elliptic, obtuse at apex, rounded at base . . . . 14. P. Kunstleri. 



Calyx subequally 5-lobed ; leaves large, stellate tomentose, as 



are branchlets and inflorescence . . . . . . 15. P. pyramidata. 



1. Pebmna littoralis, King & Gamble in Kew Bull. 107 (1908). 

 A small tree ; branchlets nearly as thick as a goosequill, obscurely 

 angled, tawny-pubescent, with small lenticels ; the nodes marked by a 

 ridge connecting the petioles. Leaves chartaceo-coriaceous ; ovate or 

 ovate-deltoid, acuminate at apex, cordate at base, the sinus '25 to '5 in. 

 deep ; both surfaces glabrous except the nerves, which are puberulous ; 

 margins acutely crenate-dentate except in the curves of the sinus ; 

 4 to 6 in. long, 2 to 3 in. broad ; midrib strong, raised beneath ; main 

 nerves 7 to 9 pairs, the lowest 1 to 2 pairs starting from the base and 

 divaricate, the rest starting at an angle of about 50^ with the midrib 

 and curving upwards ; transverse nervules distant, few, not prominent ; 

 petiole 1 to 1"5 in. long, slender, puberulous. Cymes in terminal, 

 spreading, 3-chotomous, tawny-pubescent corymbs, reaching 4 in. in 

 length and 6 in. in breadth ; peduncles '75 to 1 in. long ; primary 

 branches up to 1-5 in. long, rest gradually shorter ; bracts linear, per- 

 sistent, the lowest sometimes leaf-like ; pedicels very short, with a pair 

 of minute bracteoles below the calyx ; flowers very pale green. Calyx 

 •075 to 1 in. long, 2-lipped, upper shortly 3-lobed, lower longer, 2-lobed ; 

 lobes rounded ; tube pubescent without. Corolla 2-lipped, half as long 



