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The forerunner of the modern terrarium, the Wardian case was a small glass container for housing ferns and similar plants. It was invented in 1829 by physician and amateur botanist Nathaniel Bagshaw Ward after he noticed that, though the polluted London air was taking a toll on ferns in his garden, fern spores inside the glass bottles where he kept cocoons were germinating. His invention allowed plants to be shipped great distances and helped advance the Victorian craze for growing what flower? Discuss
Source: The Free Dictionary