what follows we write $L = L(T_v)$ to denote the set of all leaves of $T_v$.

If $T = T_X$ is the representing tree of a finite ultrametric space $(X, d)$ and $v = \{x_1, x_2, \ldots, x_n\}$ is a vertex of $T_X$, $x_i \in X$, $i = 1, \ldots, n$, then we have $$L(T_v) = \{\{x_1\}, \ldots, \{x_n\}\}.$$

=\[level distance=15mm,sibling distance=25mm\] =\[level distance=15mm,sibling distance=12mm\] =\[level distance=15mm,sibling distance=6mm\] at (3,0) ; (0) \[solid node, label=above:[$v_1$]{}\] at (0,0) child \[sibling distance=15mm\] [node(1) \[solid node, label=above:[$v_2$]{}\] ]{} child[node(1) \[solid node, label=above left:[$v_3$]{}\] child[node\[solid node, label=above:[$v_5$]{}\] child[node\[solid node, label=below:[$v_{11}$]{}\] ]{} child[node\[solid node, label=below:[$v_{12}$]{}\] ]{} ]{} child[node\[solid node, label=above left:[$v_6$]{}\] child[node\[solid node, label=below:[$v_{13}$]{}\]]{} child[node\[solid node, label=below:[$v_{14}$]{}\]]{} ]{} child \[sibling distance=6mm\] [node\[solid node, label=below:[$v_7$]{}\]]{} child \[sibling distance=6mm\] [node\[solid node, label=below:[$v_8$]{}\]]{} ]{} child[node\[solid node, label=above:[$v_4$]{}\] child[node\[solid node, label=below:[$v_9$]{}\]]{} child[node\[solid node, label=below:[$v_{10}$]{}\]]{} ]{};

=\[level distance=15mm,sibling distance=12mm\] =\[level distance=15mm,sibling distance=6mm\] =\[level distance=15mm,sibling distance=6mm\]

at (6,-1.5) ; (1) \[solid node, label=above:[$v_3$]{}\] at (7,-1.5) child [node\[solid node, label=above:[$v_5$]{}\] child[node\[solid node, label=below:[$v_{11}$]{}\] ]{} child[node\[solid node, label=below:[$v_{12}$]{}\] ]{} ]{} child [node\[solid node, label=above left:[$v_6$]{}\] child[node\[solid node, label=below:[$v_{13}$]{}\]]{} child[node\[solid node, label=below:[$v_{14}$]{}\]]{} ]{} child \[sibling distance=6mm\] [node\[solid node, label=below:[$v_7$]{}\]]{} child \[sibling distance=6mm\] [node\[solid node, label=below:[$v_8$]{}\]]{};

For $T_X$ consisting of one node only, $V(T_X) = 