The Purple Leaf False Shamrock (Oxalis triangularis papilionacea) is a perennial, rhizomatous flowering plant in the Oxalidaceae family of wood sorrel.
It is native to countries in South America.
The plant grows to 50 centimetres (20 inches) tall.
The False Shamrock has deep maroon-purple, trifoliate leaves, similar to the clover or shamrock. The leaves close up, like an umbrella, at night, which is called photonasty. The leaves are about 5 centimetres (2 inches) across.
It has white or pale-pink flowers with five petals, that also close at night.
It blooms from spring to autumn.
Photographed in Paris, France, March 2022.
Photographer: Martina Nicolls
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