Leefructus mirus shows fully developed leaves ; stem and flower that are very similar in structure to those of the modern buttercups .
The fossil form Leefructus , described in 2011 , has been recognized as a member of this order .
Leefructus   shows fully developed leaves ; stem and flower that are very similar in structure to those of the modern buttercups .
The fossil form Leefructus , described in 2011 , has been recognized as a member of this order .