Welcome to America! Before it was spotted in Los Angeles, the fruit fly species Drosophila gentica had been seen only in El Salvador back in 1954. Courtesy of Kelsey Bailey, Natural History Museum of Los Angeles County. hide caption

toggle caption Courtesy of Kelsey Bailey, Natural History Museum of Los Angeles County.

Botanists say this plant is the fern equivalent of a human-lemur love child. Harry Roskam hide caption

toggle caption Harry Roskam

'Weird' Fern Shows The Power Of Interspecies Sex

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One of the world's rarest flowers has been stolen, Britain's Kew Gardens announced this week. The water lily Nymphaea thermarum is seen here in 2010. Andrew McRobb/AP hide caption

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Rhubarb: delicious with strawberry pie, but steer clear of the leaves. Rae Ellen Bichell/NPR hide caption

toggle caption Rae Ellen Bichell/NPR