| ┌1A. | Mature leaf laminaLamina: Leaf blade.
pinnatePinnate: Pinnate Venation.
ly divided .. 2
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| │ | ┌2A. | Flowering plants usually rheophyticRheophytic: An aquatic plant that lives in fast moving water currents.
, rarely low-climbing on trees beside torrential streams. Plants always associated with sandy or rocky forest streams .. 📌1. Rhaphidophora beccarii
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| │ | └2B. | Flowering plants high-climbing on forest trees. Plants not specifically associated with watercourses .. 📌7. Rhaphidophora korthalsii
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| ├1B. | Mature leaf laminaLamina: Leaf blade.
entire, without or without perforations, but never pinnatePinnate: Pinnate Venation.
ly divided .. 3
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| │ | ┌3A. | Geniculum and abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
surface of laminaLamina: Leaf blade.
pubescentPubescent: With a hairy surface.
.. 4
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| │ | │ | ┌4A. | Flowering on clinging stems. Leaves of mature plants extensively perforateForate: With aperatures or openings.
d. Active shoot tips with black mucilage .. .. 📌6. Rhaphidophora foraminifera
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| │ | │ | └4B. | Flowering on free lateral stems. Leaves of mature plants lacking or with only with scattered, perforations. Active shoot tips lacking black mucilage .. 📌12. Rhaphidophora puberula
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| │ | ├3B. | Geniculum and abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
surface of laminaLamina: Leaf blade.
glabrousGlabrous: Smooth. Free from hair or down.
.. 5
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| │ | │ | ┌5A. | Leaves always shingling, even in flowering individuals; leaf laminaLamina: Leaf blade.
s stiffly coriaceousCoriaceous: Resembling or having the texture of leather.
, broadly oblongOblong: 
-ovateOvate: 
-ellipticElliptic: 
, S-4S x 6.5-20.5 cm, bright green, slightly to markedly glaucousGlaucous: Covered with a whitish powder or waxy coating.
, base truncate-cordateCordate: 
to broadly cuneateCuneate: 
. Flowering on clinging shoots .. .. 📌8. Rhaphidophora latevaginata
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| │ | │ | ├5B. | Leaves spreading in adult and flowering individuals; leaf laminaLamina: Leaf blade.
s variously coloured but never glaucousGlaucous: Covered with a whitish powder or waxy coating.
. Flowering on free or clinging shoots .. 6
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| │ | │ | │ | ┌6A. | Stems scabrid to asperous. SpatheSpathe: A large sheathing bract enclosing the flower cluster.
exterior minutely puberulentPuberulent: Covered in soft, downy hairs.
.. .. 📌9. Rhaphidophora lobbii
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| │ | │ | │ | ├6B. | Stems smooth. SpatheSpathe: A large sheathing bract enclosing the flower cluster.
exterior glabrousGlabrous: Smooth. Free from hair or down.
.. 7
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| │ | │ | │ | │ | ┌7A. | Clinging stems square or rectangular in cross-section; tips of active stems with netted prophyllProphyll: One of two first leaves to appear on a lateral shoot, usually smaller than the leaves that follow.
, cataphyllCataphyll: A reduced, small leaf. Usually used to describe a modified leaf which lacks a blade and in appearance corresponds to a petiole sheath.
and petiolar sheath fibre .. .. 📌4. Rhaphidophora elliptica
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| │ | │ | │ | │ | ├7B. | Clinging stems variously shaped in cross-section, including square or rectangular; tips of active stems without fibres .. 8
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| │ | │ | │ | │ | │ | ┌8A. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
stipitateStipitate: Having a stalk or stem.
; leaf laminaLamina: Leaf blade.
thickly coriaceousCoriaceous: Resembling or having the texture of leather.
.. 📌2. Rhaphidophora conocephala
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| │ | │ | │ | │ | │ | ├8B. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
sessileSessile: Attached directly by its base without a stalk or peduncle.
; leaf laminaLamina: Leaf blade.
variously textured but never thickly coriaceousCoriaceous: Resembling or having the texture of leather.
.. 9
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| │ | │ | │ | │ | │ | │ | ┌9A. | Inflorescences two, three or more together, each subtendSubtend: (of a bract) extend under (a flower) so as to support or enfold it.
ed by a prominent chartaceous prophyllProphyll: One of two first leaves to appear on a lateral shoot, usually smaller than the leaves that follow.
and one or more chartaceous cataphyllCataphyll: A reduced, small leaf. Usually used to describe a modified leaf which lacks a blade and in appearance corresponds to a petiole sheath.
; leaf laminaLamina: Leaf blade.
oblongOblong:
-lanceolateLanceolate: 
or oblongOblong:
-ellipticElliptic:
, entire to slightly perforateForate: With aperatures or openings.
d, glabrousGlabrous: Smooth. Free from hair or down.
.. 📌10. Rhaphidophora megasperma
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| │ | │ | │ | │ | │ | │ | ├9B. | Inflorescences almost always solitary, if two together then inflorescences not subtendSubtend: (of a bract) extend under (a flower) so as to support or enfold it.
ed by prominent chartaceous prophyllProphyll: One of two first leaves to appear on a lateral shoot, usually smaller than the leaves that follow.
s and cataphyllCataphyll: A reduced, small leaf. Usually used to describe a modified leaf which lacks a blade and in appearance corresponds to a petiole sheath.
s; leaf laminaLamina: Leaf blade.
variously shaped and almost never perforateForate: With aperatures or openings.
d, if perforateForate: With aperatures or openings.
d then apicalApical: Of, relating to, or denoting an apex.
geniculum and abaxialAbaxial: Facing away from the stem of a plant (especially denoting the lower surface of a leaf).
surface of laminaLamina: Leaf blade.
pubescentPubescent: With a hairy surface.
.. 10
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| │ | │ | │ | │ | │ | │ | │ | ┌10A. | Clinging stems rectangular in cross-section .. 11
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| │ | │ | │ | │ | │ | │ | │ | │ | ┌11A. | LeaflaminaLamina: Leaf blade.
lanceolateLanceolate:
-ellipticElliptic:
to falcateFalcate: Curved like a sickle; hooked.
-lanceolateLanceolate:
, 4.5-32 x 1.75-8.5 cm. SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
cylindric to weakly clavateClavate: Club-shaped; thicker at the apex than at the base.
-cylindrical, 3-6 cm long .. 📌13. Rhaphidophora sylvestris
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| │ | │ | │ | │ | │ | │ | │ | │ | └11B. | Leaf laminaLamina: Leaf blade.
narrowly ellipticElliptic:
to narrowly ellipticElliptic:
-oblongOblong:
, 20-29 x 4.5-7 cm. SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
cylindrical, c. 5 x 1 cm .. 📌5. Rhaphidophora elliptifolia
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| │ | │ | │ | │ | │ | │ | │ | ├10B. | Clinging stems more-or-less tereteTerete: Cylindrical or slightly tapering, and without substantial furrows or ridges.
in cross-section .. 12
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| │ | │ | │ | │ | │ | │ | │ | │ | ┌12A. | Leaf laminaLamina: Leaf blade.
narrowly falcateFalcate: Curved like a sickle; hooked.
-ellipticElliptic:
to falcateFalcate: Curved like a sickle; hooked.
-lanceolateLanceolate:
or falcateFalcate: Curved like a sickle; hooked.
oblanceolateLanceolate:
,2.5-16 x 1.2-3 cm, drying uniformly pale strawcoloured. SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
slender cylindrical, 2.5-7 cm long .. 📌11. Rhaphidophora minor
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| │ | │ | │ | │ | │ | │ | │ | │ | └12B. | Leaf laminaLamina: Leaf blade.
subfalcateFalcate: Curved like a sickle; hooked.
-lanceolateLanceolate:
or oblongOblong:
-ellipticElliptic:
, oblique, 10-19.5 x 2.5-6.5 cm, drying very dark brown. SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
cylindrical-obtuse,3-10 x 1 cm (fruiting specimen only) .. 📌3. Rhaphidophora cylindrosperma
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