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Allocasuarina, commonly known as sheoak [4] or she-oak, [5] is a genus of flowering plants in the family Casuarinaceae and is endemic to Australia. Plants in the genus Allocasuarina are trees or shrubs with soft, pendulous, green branchlets, the leaves reduced to scale-like teeth.
At one time, all species were placed in the genus Casuarina. Lawrence Alexander Sidney Johnson separated out many of those species and renamed them into the new genera of Gymnostoma in 1980 and 1982, [3] [4] Allocasuarina in 1982, [4] and Ceuthostoma in 1988, with some additional formal descriptions of new species in each other genus. [5]
Bentham gave it the name Casuarina decussata. [5] [6] In 1982, Lawrie Johnson moved it to its current genus Allocasuarina in his revision of the she-oaks. [7] It is closely related to A. torulosa of New South Wales and Queensland. [2] The specific epithet decussata is a Latin word meaning 'like the letter X' or 'the Roman numeral ten'. [8]
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Allocasuarina zephyrea is a species of flowering plant in the family Casuarinaceae and is endemic to Tasmania. It is a dioecious shrub that has branchlets up to 190 mm (7.5 in) long, the leaves reduced to scales in whorls of seven to nine or ten, the fruiting cones 10–25 mm (0.39–0.98 in) long containing winged seeds 4.0–5.5 mm (0.16–0. ...
Allocasuarina huegeliana, commonly known as rock sheoak [3] is a species of flowering plant in the family Casuarinaceae and is endemic to Western Australia. It is a dioecious tree that has its leaves reduced to scales in whorls of eight to ten, the mature fruiting cones 14–35 mm (0.55–1.38 in) long containing winged seeds (samaras) 5–7 mm (0.20–0.28 in) long.
Allocasuarina ophiolitica is a species of flowering plant in the family Casuarinaceae and is endemic to a small area of eastern New South Wales. It is a dioecious shrub with branchlets up to 190 mm (7.5 in) long, the leaves reduced to scales in whorls of seven to nine, the fruiting cones 9–20 mm (0.35–0.79 in) long containing winged seeds 3 ...
Allocasuarina duncanii, commonly known as Duncan's sheoak, [2] or conical sheoak, [3] is a species of flowering plant in the family Casuarinaceae and is endemic to Tasmania. It is a small dioecious tree that has branchlets up to 200 mm (7.9 in) long, the leaves reduced to scales in whorls of seven to nine, and the fruiting cones 15–60 mm (0.59–2.36 in) long containing winged seeds (samaras ...