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Tacca chantrieri is also known as the bat flower. You can probably see why. Those black, bat-like flowers can apparently grow up to 30cm in diameter!
They're shade loving plants which grow in the forest understorey across Southeast Asia and Southern China. They're also related to yams.
@InvaderXan I saw one of this once, didn't buy it, and have regretted it ever since. Everyone focuses on the flowers, but the foliage is excellent as well.
@planty You right, I’ve seldom seen the leaves in any pictures of this plant. Good to know! It seems like they should be more popular as houseplants, given their love of shade. But maybe their temperature/humidity requirements are higher than most people’s living spaces...