Woodmon

Woodmon is a Champion Level Vegetation Digimon. A bunch of them are known to disguise themselves as trees to absorb the energy from other Digimon.

Digimon Adventure
Ogremon had a run-in with a bunch of Woodmon before the meteor containing MetalEtemon crashed down on some of the Woodmon sending Ogremon off the cliff.

Digimon 02
A Woodmon was under the control of the Digimon Emperor's Dark Rings. Some Woodmon helped to rebuild the Digital World.

Digimon Tamers
Calumon's power caused 3 Woodmon to Digivolve into Cherrymon.

Digimon Frontier
3 Mushroomon became a giant Woodmon which defeated Kazemon before being defeated, purified, and reverted back to 3 Mushroomon by Lobomon.