Allocasuarina duncani
Conical She-oak
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Location & distribution maps
Phylogeny & links to associated information
Phylogeny & links to associated information
Wikipedia links: Angiosperms > Eudicots > Rosids > Fagales > Casuarinaceae > Allocasuarina duncanii
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Plant information
Plant information
Common name: Conical She-oak
Also, Duncan's sheoak
Conservation status: Rare
Listed as "rare" under the Tasmanian Government Threatened Species Protection Act 1995
The main threats to the species are inappropriate fire regimes, drought and climate change
Etymology:
The specific epithet, (duncanii) honours "Mr Fred Duncan", who brought the species to the attention of botanists
Flowers:
Male flowers are arranged in head-like spikes 7.5–13 mm long, with six to eight whorls per cm
The anthers about 1 mm long
Female cones are cylindrical, on a peduncle 4–10 mm long
Fruit:
Mature cones are 15–60 mm long and 12–25 mm in diameter, the samaras dark brown to black and 6–10 mm long
Leaves:
The leaves reduced to scale-like teeth 0.8–1.5 mm long, arranged in whorls of 7 to 9 around the branchlets
The sections of branchlet between the leaf whorls (the "articles") are 4–17 mm long and 0.9–1.4 mm wide
Stem & branches:
Its branchlets are up to 200 mm long
Roots:
Habit:
A small, erect, dioecious tree
Typically grows to a height of up to 8 m
Habitat:
Grows in shallow soil over dolerite, usually at altitudes above 500 m
Distribution:
Endemic to Tasmania
On Mount Dromedary, the Wellington Range, Snug Tiers and on South Bruny Island
Additional notes:
This sheoak is similar to A. monilifera that is mostly monoecious, and lacks the "conifer-like" habit of A duncanii
Taxonomy
It was first formally described in 1994 by Lawrie Johnson and Dennis Morris in the journal Telopea from specimens collected near the headwaters of the Nicholls Rivulet in 1993
Sources of information:
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