Tristania

taxobox
name = "Tristania"
regnum = Plantae
unranked_divisio = Angiosperms
unranked_classis = Eudicots
unranked_ordo = Rosids
ordo = Myrtales
familia = Myrtaceae
genus = "Tristania"
genus_authority = R.Br.
binomial = "Tristania neriifolia"
binomial_authority =
subdivision_ranks = Species|

"Tristania" is a monotypic genus in the myrtle family Myrtaceae, native to New South Wales, Australia, closely related to "Callistemon". The genus had a number of species, but some have been reclassified as "Lophostemon" and "Tristaniopsis".

The sole species in the genus is "T. neriifolia".

It is a small tree, with dense branching. The leaves are evergreen, opposite, simple, lanceolate, from 5-9 cm long and 1 cm broad. The flowers are produced in dense clusters of 3-15 together; each flower is 1-1.5 cm diameter, with five small yellow petals and numerous conspicuous stamens.

It is commonly known as the water gum.