tree trunks covered in bacterial crown galls (agrobacterium radiobacter) along hickling recreational trail

tree woodland plant forest trunk branch deciduous grove wood leaf spruce wilderness autumn trail nature trunks covered bacterial crown galls agrobacterium radiobacter hickling recreational spring conifer pine radiobacter background bacteria bacterial bark beautiful beauty botany branch bright brown canada color colorful conservation environment flora foliage forest gall green hiking landscape leaf leaves light natural nature ontario outdoor plant scenery season shadow sky spring sunlight sunny tourism trail travel tree trunk view white wild wilderness