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The monophyly of these genera was later supported in a 2003 phylogenetic study of the family. [6] In the Wettstein system , this family was the only one placed in the order Verticillatae. Likewise, in the Engler , Cronquist , and Kubitzki systems , the Casuarinaceae were the only family placed in the order Casuarinales.
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 ...
Allocasuarina media is a dioecious, or rarely a monoecious shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and has smooth bark. Its branchlets are more or less erect, up to 200 mm (7.9 in) long, the leaves reduced to erect or slightly spreading, scale-like teeth about 0.5 mm (0.020 in) long, arranged in whorls of six to eight around the branchlets.
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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 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). Its branchlets are more or less erect, up to 80 mm (3.1 in) long, the leaves reduced to erect, scale-like teeth 0.5–0.6 mm (0.020–0.024 in) long, arranged in whorls of four to six around the branchlets.
Allocasuarina diminuta is a dioecious or monoecious shrub or small tree that typically grows to a height of 1–5 m (3 ft 3 in – 16 ft 5 in) and has smooth bark. . Its branchlets are more or less erect, up to 230 mm (9.1 in) long, the leaves reduced to erect to spreading, scale-like teeth 0.3–0.8 mm (0.012–0.031 in) long, arranged in whorls of six to ten around the branchl
Allocasuarina lehmanniana is a dioecious, or less commonly a monoecious shrub that typically grows to a height of 1.5–4 m (4 ft 11 in – 13 ft 1 in). Its branchlets are up to 120–200 mm (4.7–7.9 in) long (depending on subspecies), the leaves reduced to scale-like teeth 0.4–0.8 mm (0.016–0.031 in) long, arranged in whorls of six to eight around the branchlets.