| ┌1A. | Stoloniferous colonial helophyteHelophyte: A bog plant; especially a perennial marsh plant having its overwintering buds under water.
s .. 2
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| │ | ┌2A. | SpatheSpathe: A large sheathing bract enclosing the flower cluster.
not divided into a lower and upper portion by a constriction; staminate and pistilPistil: The female reproductive part of a flower.
late flower zones separated by a conspicuous naked interstice .. 📌Expedita Complex
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| │ | └2B. | SpatheSpathe: A large sheathing bract enclosing the flower cluster.
divided into a lower and upper portion by a constriction; staminate and pistilPistil: The female reproductive part of a flower.
late flower zones contiguous .. 📌Rostrata Complex
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| ├1B. | Solitary or clumping terrestrial or lithophytic mesophytes .. 3
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| │ | ┌3A. | SpatheSpathe: A large sheathing bract enclosing the flower cluster.
not divided into a lower and upper portion by a constriction; stamenStamen: The pollen-producing reproductive organ of a flower.
s without a conspicuous, flat connective; leaf blades abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly with conspicuous pellucidPellucid: Translucently clear.
striate veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins. 
-like glands running parallelParallel: Parallel Venation.
to the primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
s .. 📌Selaburensis Complex
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| │ | ├3B. | SpatheSpathe: A large sheathing bract enclosing the flower cluster.
divided by a weak to pronounced constriction into a welldefined upper (limb) and a lower portion; stamenStamen: The pollen-producing reproductive organ of a flower.
s with a conspicuous flat connective; leaf blades lacking pellucidPellucid: Translucently clear.
veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
-like glands (if present, then leaf blades lacking posteriorPosterior: 
lobes, weakly peltatePeltate: 
, and interpistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s absent or leaf blades cordiform and interspistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s present) .. 4
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| │ | │ | ┌4A. | Leaf blades abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly with pellucidPellucid: Translucently clear.
veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
-like glands .. 5
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| │ | │ | │ | ┌5A. | Leaf blade weakly peltatePeltate:
, lacking posteriorPosterior:
lobes, blade pendulous from the petiolePetiole: Leaf stem.
; petiolar sheath margins persistentPersistent: Remaining attached to the plant beyond the usual time of falling.
; interpistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s absent .. 📌Havilandii Complex
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| │ | │ | │ | └5B. | Leaf blade cordiform, spreading; petiolar sheath with margins marcescentMarcescent: Withering but remaining attached to the stem.
; interpistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s present .. 📌Wongii Complex
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| │ | │ | ├4B. | Leaf blade without pellucidPellucid: Translucently clear.
striate veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
-like glands .. 6
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| │ | │ | │ | ┌6A. | Lower spatheSpathe: A large sheathing bract enclosing the flower cluster.
longer than spatheSpathe: A large sheathing bract enclosing the flower cluster.
limb .. 7
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| │ | │ | │ | │ | ┌7A. | Leaf blade rubbery, cordiform, glossy bright green, primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
s rather numerous; staminate flower zone producing amber-coloured resin droplets .. 📌Giamensis Complex
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| │ | │ | │ | │ | └7B. | Leaf blade leathery, with little or no posteriorPosterior:
lobe development, base broadly truncate, often adaxially matte medium green, and weakly glaucousGlaucous: Covered with a whitish powder or waxy coating.
abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
ly; primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
s few; staminate flower zone not producing resin droplets .. 📌Borneensis Complex
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| │ | │ | │ | ├6B. | SpatheSpathe: A large sheathing bract enclosing the flower cluster.
limb longer than or equalling lower spatheSpathe: A large sheathing bract enclosing the flower cluster.
.. 8
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| │ | │ | │ | │ | ┌8A. | Leaf blade cordateCordate: 
-sagittateSagittate: 
, somewhat to much quilted between the primary lateral veinVein: Venation types: A. midrib; B. primary lateral veins; C. interprimaray veins; D. secondary veins; E. collective veins; F. tertiary veins; G. basal ribs; H. basal veins.
s, adaxially with scattered conspicuous punctatePunctate: Dotted with minute pits or translucent dots.
glands; petiolar sheath margins soon marcescentMarcescent: Withering but remaining attached to the stem.
(observe leaf immediately below flowering event); staminate flower zone (almost always) producing amber-coloured resin droplets; interpistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s present .. 📌Hanneae Complex
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| │ | │ | │ | │ | └8B. | Leaf blade oblongOblong: 
to oblongOblong:
-ellipticElliptic: 
, not quilted, and lacking punctatePunctate: Dotted with minute pits or translucent dots.
glands; petiolar sheath persistentPersistent: Remaining attached to the plant beyond the usual time of falling.
; staminate flower zone without resin; interpistilPistil: The female reproductive part of a flower.
lar staminodeStaminode: A sterile or abortive stamen, frequently resembling a stamen without its anther.
s absent .. 📌Insignis Complex
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