The American cranberry ( Vaccinium macrocarpon Ait . ) is the only land plant known to possess sequence - level machinery for producing selenocysteine in its mitochondrial genome .
Cranberry 's level of functionality is not yet determined .
The American cranberry ( Vaccinium macrocarpon Ait . ) is the only land plant known to possess sequence - level machinery for producing selenocysteine in its mitochondrial genome , although its level of functionality is not yet determined .