Commemorating John T.Waterhouse (1924–83), botanist and lecturer at the University of New South Wales, Sydney.

Trees with hairless branchlets. Leaves stalked, oil-dotted and with an intramarginal vein. Flower clusters terminal and in the upper leaf axils, branched. Flowers 4-5-parted. Ovary with 2 chambers. Fruits generally hard, more or less round, with a characteristic short persistent calyx tube at the tip; seeds 1.

Grown for the attractive pendulous branches and wavy-edged leaves.

Closely related to Syzygium and may be united with that genus in future.

4 species from tropical Australia.

Seed or cuttings.

Fruit wriggly in section (ruminate) and with a persistent hard calyx tube at the tip.

Hyland (1983).

Source: Spencer, R. (2002). Myrtaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.