Allocasuarina nana, commonly known as dwarf she-oak[2] or as stunted sheoak,[3] is a species of flowering plant in the family Casuarinaceae and is endemic to south-eastern continental Australia.

Allocasuarina nana is a spreading, dioecious or rarely monoecious shrub that typically grows to a height of 0.2–2 m (7.9 in – 6 ft 6.7 in).

Male flowers are arranged in dense spikes 5–10 mm (0.20–0.39 in) long, with 16 to 20 whorls per centimetre (per 0.39 in.

[2][3][4][5] This she-oak was first described in 1826 by Kurt Polycarp Joachim Sprengel who gave it the name Casuarina nana in Systema Vegetabilium, from an unpublished description by Franz Sieber.

[6][7] In 1989 by Lawrie Johnson transferred the species to the genus Allocasuarina as A. nana in the Journal of the Adelaide Botanic Gardens.