The leaf of a fig tree. Commonly used as a censor of the genitals in statues or paintings around the middle ages, sometimes applied to already existing statues or paintings, it has also become an idiom for obscuring things.
https://en.wikipedia.org/wiki/Fig_leaf The idiom and usage as censorship
https://en.wikipedia.org/wiki/Ficus The plants (it is a genus, not a single species)
This tag implicates leaf (learn more).