%!TEX TS-program = xelatex
\documentclass[10pt]{article}
%\usepackage[utf8]{inputenc} %useful to type directly diacritic characters
\usepackage{pstricks,pst-jtree,pst-node}
\listfiles

\begin{document}

\jtree[xunit=2.8em,yunit=1em] 
 \! = {ST}
:{SN} {T'} .
\endjtree


\end{document}
