Flora of the Malayan Peninsula. 



745 



narrow, usually splitting along the upper edge. Seeds numerous, 

 minute, ellipsoid, not plumed. — Distrib. Species about one hundred, 

 in India and Malaya. 



Sect. I. Elat^ : — 

 Stem tall, branched, shrubby ; leaves in distant pairs, 

 unequal ; bract 1, cupshaped .. .. .. 1 



Stem long and weak ; bracts 2, ovate . . . . 2 



Stem weak : — 

 Bracts ovate, amplexicaul ; flowers yellow . . . . i: 



Bracts oblong, glabrous ; flowers claret colour . . 4 



Sect. II. DiDYMANTHus : — 

 Stem erect, herbaceous ; leaves in distant pairs : — 

 Flowers very small, -25 in. long, axillary 

 Flowers medium-sized : — 

 Flowers yellow : — 



Leaves lanceolate acute 

 ■Leaves ovate acuminate 

 Leaves unequal, narrowly lanceolate . . 

 Flowers white : — - 

 Leaves opposite, equal, hairy, ovate : — 

 Edges pubescent 

 Edges conspicuously red-hairy 

 Leaves lanceolate, thinly pubescent 

 • Leaves subglabrous, equal, long-petioled 

 Leaves. glabrous, unequal: — 



Flowers solitary, on short peduncles 

 Flowers in pairs on long peduncles from upper 

 axils 

 Stem erect, herbaceous, little-branched; flowers yellow; 

 corolla cylindric, trumpet-shaped : — 



Leaves petioled, silky, in distant pairs : — 

 Corolla 2 in. long . . 

 Corolla 1 in. long . . 

 Leaves crowded above, hairy: — 



Stem slender ; flowers small, congested 

 Stem woody : — 

 Leaves glabrous, congested at the top, not petioled ; 

 flowers yellow 



Leaves alternate lanceolate, insequilateral ; flowers 

 blue . . 



Leaves crowded or distant, elliptic, petioled ; 

 flowers white 

 Sect. III. Eeptantes. Prostrate or creeping herbs. Leaves 

 in distant pairs, equal or unequal, hairy or pubescent : — 

 Flowers blue or white, sometimes with yellow streaks : — 

 Leaves hairy, rarely glabrous; flower in uppermost 

 axil, peduncle short . . 



2 



D. corchorifolia. 

 D. sulphur ea. 



D. citrina. 

 D. inirpurea. 



5. D. parviflora. 



D. flava. 

 D. ramosa. 

 D. Jfavescens. 



9. 

 10. 

 11. 

 12. 



13. 



14. 



D. hispida. 

 D. hirta. 

 D. viscida. 

 D. albina. 



D. alternans. 



D. glabrata. 



15. 



D. 



malayana. 



16. 



D. 



albomarginata. 



17. 



D. 



flavobrunnea. 



18. 



D. 



longipes. 



19. 



D. 



incequalis. 



20. 



D. 



alba. 



21. D. reptans. 



