A nebiki(no)matsu (根引き松/根引松/根引きの松), that literally means "uprooted pines", is a traditional Japanese New Year decoration used in Kyoto instead of Kadomatsu. It is considered as the origin of Kadomatsu.
See also
- GJC's blog entry: http://yakumosworld.aminus3.com/image/2011-01-05.html