Describing leaves of a tree with an underbrace using pstree/pstricks

Question

I'd like to have a discription for some of the leaves. It doesn't need to be an underbace, if somebody has better graphical suggestions... :)

Consider this example:

\pstree[levelsep=35pt]{\Tcircle{$\rho$}}
  {
    \Tf*
    \Tf*
    \psset{linestyle=none}  \Tr{$\cdots$} \psset{linestyle=solid}
    \Tf*
    \Tf*
    \Tf*
    \psset{linestyle=none}  \Tr{$\cdots$} \psset{linestyle=solid}
    \Tf*

  }

I'm thinking about something like this, which of won't work that way:

\pstree[levelsep=35pt]{\Tcircle{$\rho$}}
  {
    \underbrace{
      \Tf*
      \Tf*
      \psset{linestyle=none}  \Tr{$\cdots$} \psset{linestyle=solid}
      \Tf*
    }_{n \mbox{trees}}
    \underbrace{
      \Tf*
      \Tf*
      \psset{linestyle=none}  \Tr{$\cdots$} \psset{linestyle=solid}
      \Tf*
    }_{n \mbox{trees}}
  }

Answer 1

Every tree works like a node. SO you can name the node to use it later. The brace is drawn with \psbrace:

\documentclass{scrartcl}
\usepackage{pstricks}
\usepackage{pst-node,pst-tree}
\usepackage{pstricks-add}
\begin{document}
\pstree[levelsep=35pt]{\Tcircle{$\rho$}}
  {
    \Tf*[name=first]
    \Tf*
    {\psset{linestyle=none}  \Tr{$\cdots$}}
    \Tf*[name=second]
    \Tf*
    \Tf*
    {\psset{linestyle=none}  \Tr{$\cdots$}}
    \Tf*
  }
\psbrace*[linecolor=blue,ref=lC]([nodesep=5pt,angle=-165]first)([nodesep=5pt,angle=-15]second){\rotatebox{90}{$n$ trees}}
\end{document}​

Answer 2

\documentclass{scrartcl}
\usepackage{pst-tree,pstricks-add}
\begin{document}

\pstree[levelsep=1.2cm]{\Tcircle{$\rho$}}{
    \Tf*[name=first]
    \Tf*
    \Tn{\ldots}
    \Tf*[name=second]
    \Tf*
    \Tf*
    \Tn{\ldots}
    \Tf*}
\psbrace*[linecolor=blue,ref=tC,rot=90,nodesep=2mm]([angle=-165]first)([angle=-15]second){Text II}
\end{document}