Example of dendrogram tree structure for IRDC 015.05+0.09. The indices are those listed in Table B.1 in order of increasing right ascension. The black leaves (3, 6, 7, and 8) have no parent tree structure, and the red leaves are nested in separate trunks. Their flux values were corrected for the local merge level, which is marked in blue. The horizontal black dashed line shows the 3σ minimum flux requirement for this cloud.