\arguments{
\item{x}{an object of class \code{"phylo"}.}
\item{y}{an object of class \code{"phylo"}.}
- \item{where}{an) integer giving the number of the node or tip of the
+ \item{where}{an integer giving the number of the node or tip of the
tree \code{x} where the tree \code{y} is binded (\code{"root"} is a
short-cut for the root).}
\item{position}{a numeric value giving the position from the tip or