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

itoggle 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

itoggle caption Harry Roskam

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

itoggle caption Andrew McRobb/AP

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

itoggle caption Rae Ellen Bichell/NPR