Phyllanthus mirabilis is a plant species of family Phyllanthaceae endemic to Thailand. It is the only Phyllanthus to be caudiciform. Pinnate, glossy green to dark coppery-red (when young), folding at night.
Phyllanthus mirabilis is a shrub, or a small deciduous tree, that may slowly grow to a maximum hight of 8 metres and 30 centimetres in diameter. This small tree found in bogs in Thailand has been described by the Swiss Müller Argoviensis, Johannes (Jean) in 1865. During his youth the base of the trunk takes a caudiciform/succulent shape that usually gradually disappears with its growth. It is the only Phyllanthus to be caudiciform. Another peculiarity of this plant is that the leaves fold together in pairs like butterfly wings at dusk, and open again in the morning. It cultivation it is a nice bonsai plant.