What is the rarest flowers??

[Inuyasha]

Arisaema candidissimum

Calanthe sieboldii

Nerine falcata

or any other.

Consider flowers are valuable if they have biological use, beautry, or just are plain rare. What i believe is the rarest flower is the midnight bloom which only blooms with the cycles of the moon. I think only fifty of them exist. Does anyone have the genus species name of the plant i'm describing.

[mothorc]

Epiphyllum oxypetalum
It is a plant which flowers blooming at mid night

[mothorc]

Calanthe sieboldii (common orchid)
I dont think it is used as a drug or anything
in our country we dont use this species a lot
and it bloom under sun (see pigment on petal)

[Inuyasha]

thanks, i wanted to know what the midnight flower is. ANy idea of the values of these flowers?