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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] At the time, it was somewhat controversial.
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 ...
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Allocasuarina striata, commonly known as the small bull oak, [1] stalked oak-bush [2] or the tall oak-bush, is a shrub of the genus Allocasuarina native to South Australia. [ 3 ] Description
Allocasuarina grampiana is a dioecious shrub that typically grows to a height of 1–4 m (3 ft 3 in – 13 ft 1 in) and has smooth bark. Its branchlets are more or less erect, up to 150 mm (5.9 in) long, the leaves reduced to erect to slightly spreading, scale-like teeth 0.4–0.8 mm (0.016–0.031 in) long, arranged in whorls of six or seven around the branchlets.
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 ...
Allocasuarina simulans is a dioecious, rarely a monoecious shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and mainly has smooth bark. Its branchlets are up to 190 mm (7.5 in) long, the leaves reduced to erect, often overlapping, scale-like teeth 0.5–1.1 mm (0.02–0.04 in) long, arranged in whorls of six around the branchlets.
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