Allocasuarina crassa

Allocasuarina crassa, commonly known as Cape Pillar sheoak, is a species of flowering plant in the family Casuarinaceae and is endemic to a small area in far south-eastern Tasmania. It is a low shrub to small tree that is monoecious or dioecious, with spreading to erect branchlets up to 170 mm (6.7 in) long, the leaves reduced to scales in whorls of seven to ten, the fruiting cones 15–34 mm (0.6–1 in) long containing winged seeds (samaras) 5–8 mm (0.2–0.3 in) long.

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Allocasuarina crassa is a dioecious or monoecious shrub that typically grows to a height of 1–2 m (3 ft 3 in – 6 ft 7 in), or sometimes a small tree to 14 m (46 ft), and has smooth bark. Its branchlets are spreading to more or less erect, up to 170 mm (7 in) long, the leaves reduced to erect, scale-like teeth 1.1–3 mm (0.04–0.1 in) long, arranged in whorls of seven to ten around the branchlets. The sections of branchlet between the leaf whorls (the "articles") are 10–20 mm (0.4–0.8 in) long and 1.2–2.0 mm (0.05–0.08 in) wide and the furrows along the branchlets are hairy. Male flowers are arranged in spikes about 20 mm (0.8 in) long, the anthers 0.8–1 mm (0.03–0.04 in) long. Female cones are cylindrical and sessile or on a peduncle up to 3 mm (0.1 in) long. Mature cones are 15–34 mm (0.6–1 in) long and 12–15 mm (0.5–0.6 in) in diameter, the samaras black 5–8 mm (0.2–0.3 in) long.