Nothofagus cunninghamii (Hook.f.) Oerst.
Myrtle beech
The tree tag number relates to the black tree-maintenance tags, usually fixed on the trunk, 2 to 3m above ground level.
A native of Tasmania and Victoria, the myrtle beech can grow to 50m tall but can also form a low shrub in Alpine situations. It is described as a ‘small tree’ in The Hillier manual. The leaves are finely toothed, distinct from the otherwise similar Nothofagus cliffortiordes which has untoothed leaves (see below). Another small-leaved Nothofagus, N. antarctica grows near this in Belfast Botanic Gardens. Both species are situated in the small triangular area close to the gate to the Physical Education Center.
Excellent detail about the species may be found in Trees and Shrubs Online and also on Wikipedia.
The binomial name, authority and family used here are the approved names given in the Plants of the World online (at the time of writing).
Photos taken in Belfast Botanic Gardens in 2010 and 2013. Copyright: Friends of Belfast Botanic Gardens.