The environments range from Alpine area on the higher mountains, sclerophyll forest, to woodland.
Trees do not exists on the grasslands due to the frost hollow effect where cold heavy air sinks on frosty mornings killing off larger vegetation.
A small reserve of remnant grasslands is found at Yarramundi on the north side of Lake Burley Griffin.
High altitude woodland occupies the floor of the higher valleys in the south of the ACT.
Dry sclerophyll forest also grows on the north and west side of hills, below 660 metres, which is warmer and drier.
Wet sclerophyll forest is found growing on the western mountainous parts of the ACT where rain fall is higher and the ground is more elevated.
E. fastigata (brown barrel) and Eucalyptus delegatensis (alpine ash) dominate the forest.
Examples of these are Leptospermum lanigerum, Pomaderris aspera, Olearia argophylla, and Bedfordia salicina.
Alpine woodland is found in the highest levels of the ACT with E. pauciflora the dominant tree.