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The genera Allocasuarina was created out of a grouping of plants formerly placed in Casuarina, because of subtle but consistent differences – Casuarina species have 6 to 20 scale-like teeth in each whorl of leaves, their samaras are grey or yellowish-brown, and the bracteoles of the fruiting cones are thin, woody and extend well beyond the ...
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]
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 ...
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. ...
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]
Allocasuarina muelleriana is dioecious, rarely a monoecious shrub that typically grows to a height of 0.5–4 m (1 ft 8 in – 13 ft 1 in) high and has smooth bark. . Its branchlets are more or less erect and up to 120 mm (4.7 in) long, the leaves reduced to scale-like teeth 0.3–0.6 mm (0.012–0.024 in) long, arranged in whorls of five to eight around the branchle
Mature cone. Allocasuarina corniculata is a species of flowering plant in the family Casuarinaceae and is endemic to the south-west of Western Australia. It is an erect to spreading, dioecious shrub that has more or less erect branchlets, the leaves reduced to scales in whorls of six to eleven, the mature fruiting cones 8–15 mm (0.31–0.59 in) long containing winged seeds (samaras) 3–4 mm ...
Allocasuarina microstachya is a species of flowering plant in the family Casuarinaceae and is endemic to the south-west of Western Australia. It is dioecious shrub that has its leaves reduced to scales in whorls of four, the mature fruiting cones 8–12 mm (0.31–0.47 in) long containing winged seeds 2.5–5.0 mm (0.098–0.197 in) long.