Top 10 most rare flowers and what makes them special

3. Lady’s slipper orchids – an unusual plant
Lady's slippers are some of the most rare flowers in the world.
Credit: Flickr / janet graham
Given its name from the ballet-shoe shape, the lady’s slipper orchid is a beautiful, delicate flower. However, don’t be fooled by its delicate qualities, as it is actually moderately poisonous.

They are one of the rarest flowers in the world because they don’t bloom every year. In fact, once it has germinated, it can take years before the lady’s slipper first blooms.
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