Are both Nerium or Thuja could be a shrub?
Thuja Thuja ( ) is a genus of coniferous trees in the Cupressaceae (cypress family). There are five species in the genus, two native to North America and three native to eastern Asia. The genus is monophyletic and sister to "Thujopsis". Members are commonly known as arborvitaes, (from Latin for "tree of life") thujas or cedars.
Neofabricia Neofabricia is a genus of shrubs and small trees in the Myrtaceae family, first described as a genus in 1788, with the name "Fabricia". This, however, was an illegitimate homonym, in other words, someone had already used the name to refer to a very different plant. Therefore, this group in the Myrtaceae was renamed "Neofabricia". The entire genus is endemic to Queensland.