| ┌1A. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
with sterile apexApex: End forming a point.
formed of fused synandrodeSynandrode: A set of fused sterile stamens.
s .. 2
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| │ | ┌2A. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
sterile apexApex: End forming a point.
greatly elongated, exceeding spatheSpathe: A large sheathing bract enclosing the flower cluster.
limb .. 📌1. Hapaline appendiculata
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| │ | ├2B. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
sterile apexApex: End forming a point.
not greatly elongated, not exceeding spatheSpathe: A large sheathing bract enclosing the flower cluster.
limb .. 3
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| │ | │ | ┌3A. | Whole plant never more than 5 cm high. Inflorescences borne on short pedunclePeduncle: Flower stem.
s beneath the foliage; spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
c. 1 cm long 2. 📌Hapaline celatrix
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| │ | │ | └3B. | Whole plant generally more than 5 cm high. Inflorescences borne above the foliage; spadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
5-8 cm long .. 📌3. Hapaline brownii
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| ├1B. | SpadixSpadix: A spike of minute flowers closely arranged around a fleshy axis and typically enclosed in a spathe.
with sterile apexApex: End forming a point.
formed of free synandrodeSynandrode: A set of fused sterile stamens.
s . 4
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| │ | ┌4A. | Leaf blade broadly ellipticElliptic: 
-cordiform; ovaryOvary: The part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals.
solitary .. 📌4. Hapaline kerrii
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| │ | ├4B. | Leaf blade sagittateSagittate: 
, hastateHastate: 
or ellipticElliptic:
; ovaries 7 - 8 .. 5
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| │ | │ | ┌5A. | Leaf blade hastateHastate:
, strongly constricted above the posteriorPosterior:
lobes .. 📌7. Hapaline colaniae
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| │ | │ | ├5B. | Leaf blade variably sagittateSagittate:
or ellipticElliptic:
, not or barely constricted above the posteriorPosterior:
lobes .. 6
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| │ | │ | │ | ┌6A. | Leaf blade variably sagittateSagittate:
, occasionally constricted at the junction of the anteriorAnterior:
and posteriorPosterior:
lobes, posteriorPosterior:
lobes divergent; ovaryOvary: The part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals.
ovoid .. 📌5. Hapaline benthamiana
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| │ | │ | │ | └6B. | Leaf blade ellipticElliptic:
, never constricted at the junction of the anteriorAnterior:
and posteriorPosterior:
lobes, posteriorPosterior:
leaf lobes not divergent; ovaryOvary: The part of the pistil which holds the ovule(s) and is located above or below or at the point of connection with the base of the petals and sepals.
bottle-shaped .. 📌6. Hapaline ellipticifolia
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