560 



Flora of the Malayan Peninsula^ 



Flowers dark purple ; corolla much over 1*5 in. in diam. 5. H. imperialis. 

 Lower lobes beaked ; upper lobes short, acute ; stems 

 slender ; leaves thin, under 4 in. long . . ..&. H. elliptica. 



Lower lobes horizontal or nearly so, flattened above ; leaf- 

 nerves usually at an acute angle with the midrib : — 



Flowers large, reaching 1-5 in. in diam. ; leaves velvety 

 pubescent beneath ; caudicles of pollen-masses long, 

 slender, twisted . . . . . . . . 7. H. coronaria. 



Flowers small, rarely -5 in. in diam. ; leaves glabrous 

 beneath ; caudicles short, usually thick : — 



Lower lobe of corona very thick and blunt vertically, 

 upper short ; leaves ovate-lanceolate, cordate, faintly 

 nerved . . . . . . . . . . S. H. Scortechinii. 



Lower lobe of corona thin vertically, short : — 



Leaves obscurely nerved, about 3 to 4 pairs, very 

 thick ; lower corona-lobes obtuse ; upper long, acu- 

 minate ; appendages very long acuminate . . 9. H. caudata. 

 Leaves prominently 3- to 5-nerved, very thick ; 

 peduncles many from the axils ; lower corona-lobes 

 concave, obtuse . . . . . . . . 10. H. latifolia. 



Leaves not 3-nerved from the base ; peduncles usually 

 1 only at the axils : — 

 Leaves small ; main nerves at right angles to the 

 midrib, indistinct .. .. .. IL H. lacunosa. 



Leaves moderate-sized, under 4 in. long; elliptic or 

 obovate; main nerves indistinct, at about 60° with 

 the midrib ; climber . . . . . . 12. H. diversifolia. 



Leaves large, over 7 in. long, oblanceolate ; main 



nerves prominent, as are reticulations ; trailer, 



epiphytic 



Corona with lower lobes of processes acute or nearly so :- 



Leaves with nerves easily visible when dry : — 



Leaves with 5 basal nerves, the lowest pair faint 



Leaves pinnately nerved : — 



Flowers moderately large, -o in. in diam. in bud ; leaves 



with not very conspicuous reticulations ; follicles with 



very thick pericarp . . . . . . . . 15. H. coriacea. 



Flowers small, -25 in. in diam. in bud: — ■ 



Leaves large, usually over 5 in. in length and 1'5 in. 

 in breadth ; main nerves very prominent : — 



Main nerves at 40° with the midrib ; reticulations 



prominent, chiefly on upper surface, but not sharp 16. H. Forbesii. 



Main nerves at 60° with the midrib ; reticulations 



very prominent and sharp on both sides ; follicles 



with thin pericarp . . . . . . 17. H. Finlaysonn. 



Leaves moderate- sized, usually under 5 in. in length 

 and 1-75 in. in breadth ; main nerves nearly at right 

 angles to midrib, rather faint on both surfaces . . 18. H. Ridleyi. 

 Leaves with nerves not or very faintly visible when dry : — 



13. 



14. 



H. Maingayi. 

 H. parasitica . 



