Dendrogram of the clumps in the ¹³CO(J = 2–1) emission in the lower region. Colors of lines representing clumps are the same as colors of regions showing clumps in Figs. 4 and B.1–B.3. Solid lines and filled regions (in Figs. 4 and B.1–B.3) show clumps 16D1–18, 16C1 and 16B1–3, dashed lines and dotted regions (in Figs. 4 and B.1–B.3) show clumps 16D19–35 (see beginning of Sect. 4 for the nomenclature definition).