"A Ukrainian word chornobyl, and that this word refers to the mugwort (Artemisia vulgaris). Mugwort is a close relative of wormwood (Artemisia absinthium). As a result, chornobyl has been translated by some to be the equivalent of the English name wormwood." thank you Wikipedia
The Wiki aticle discusses the equating of a Ukrainian word "chornobyl" with the Russian word "chernobyl"
http://en.wikipedia.org/wiki/Chernobyl_in_the_popular_consciousness