A file geodatabase of burn units in Matthaei Botanical Gardens and Nichols Arboretum dating back to 2004. Layers are separated by property and year in corresponding Feature Layer Datasets ("Arboretum_Burns" and "Botanical_Gardens_Burns"). Also contains two layers with all burn layers for each property overlaid ("Arb_Burns_to_2015" and "MBG_Burns_to_2015"). These latter layers are useful for displaying time-lapse maps.