Caption: "Spirit of Lakwammen from Songhees Point Park, Victoria, British Columbia, Canada." A totem pole of the Songhees on Vancouver Island.

An example of 1-dimensional hierarchy.

Credit/Permission: Ryan Bushby (AKA User:HighInBC"), 2006 (User:User:File Upload Bot (Magnus Manske), 2010) / Public domain.
Image link: Wikimedia Commons: File:Totem Park pole 2.jpg.
Local file: local link: hierarchy_totem_pole.html.
File: Science file: hierarchy_totem_pole.html.