working tree figure using tikz recoverd from earlier commit

compendium.tex

@@ -45,6 +45,15 @@
 
 \section{Prokaryota, Eukaryota \& Archea}
 
+\begin{figure}[!ht]
+	\tikz \graph [phylogenetic tree layout, grow'=right] {
+		a -- {
+			b [>length=2] --[length=1] { c, d },
+			e [>length=3]
+		}
+	};
+\end{figure}
+
 \section{Algen}