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'''Allocasuarina''' is a genus in the flowering plant family Casuarinaceae. They are endemic to Australia, occurring primarily in the south. Like the closely related genus ''Casuarina'', they are commonly called 'sheoaks' or 'she-oaks', they are notable for their long, segmented branchlets that function as leaves. Formally termed cladodes, these branchlets somewhat resemble pine needles, although sheoaks are actually flowering plants. The leaves are reduced to minute scales encircling each joint. Fallen cladodes form a dense, soft mat beneath sheoaks, preventing the development of undergrowth and making sheoak woods remarkably quiet.
Another characteristic feature are the spiny "cones", about the size of an acorn but with a texture more resembling a conifer cone. However, sheoak "cones" are actually a woody fruit.
As with legumes, sheoak roots possess nodules containing symbiotic nitrogen fixing bacteria; together with their highly drought adapted foliage, this enables sheoaks to thrive in very poor soil and semi-arid areas. However, sheoaks are much less bushfire tolerant than eucalypts.
Fossils of closely related species have been found dating back to the time of Gondwana.

Contents

Uses

List of ''Allocasuarina'' species

References

External links

Uses

The hard wood and rich texture makes sheoak wood popular among wood-turners. Sheoak wood is also regarded as an excellent firewood as it burns with very little ash.
Because of its ability to grow and develop extensive root systems in very poor or sandy soils, and to completely cover the ground with its "needles", it is often used to stabilise soils in erosion prone areas, or on sand dunes. Sheoak is also used as an ornamental shrub, although for this purpose the mat of "needles" may become a nuisance and must be carefully considered.

List of ''Allocasuarina'' species

★ ''Allocasuarina acuaria'' ★ ''Allocasuarina acutivalvis'' ★ ''Allocasuarina brachystachya'' ★ ''Allocasuarina campestris'' ★ ''Allocasuarina corniculata'' ★ ''Allocasuarina crassa'' ★ ''Allocasuarina decaisneana'' ★ ''Allocasuarina decussata'' ★ ''Allocasuarina defungens'' ★ ''Allocasuarina dielsiana'' ★ ''Allocasuarina diminuta'' ★ ''Allocasuarina distyla'' (scrub sheoak) ★ ''Allocasuarina drummondiana'' ★ ''Allocasuarina duncanii'' (Duncan's sheoak) ★ ''Allocasuarina emuina'' ★ ''Allocasuarina eriochlamys'' ★ ''Allocasuarina fibrosa'' ★ ''Allocasuarina filidens'' ★ ''Allocasuarina fraseriana'' (common sheoak) ★ ''Allocasuarina glareicola''[1] ★ ''Allocasuarina globosa'' ★ ''Allocasuarina grampiana'' ★ ''Allocasuarina grevilleoides'' ★ ''Allocasuarina gymnanthera'' ★ ''Allocasuarina helmsii'' ★ ''Allocasuarina huegeliana'' (rock sheoak) ★ ''Allocasuarina humilis'' ★ ''Allocasuarina inophloia'' ★ ''Allocasuarina lehmanniana'' (dune sheoak) ★ ''Allocasuarina littoralis'' (black sheoak)[2]

★ ''Allocasuarina luehmannii'' (bull-oak) ★ ''Allocasuarina mackliniana'' (dwarf sheoak) ★ ''Allocasuarina media'' ★ ''Allocasuarina microstachya'' ★ ''Allocasuarina misera'' ★ ''Allocasuarina monilifera'' ★ ''Allocasuarina muelleriana'' (slaty sheoak) ★ ''Allocasuarina nana'' ★ ''Allocasuarina ophiolitica'' ★ ''Allocasuarina paludosa'' (scrub sheoak) ★ ''Allocasuarina paradoxa'' ★ ''Allocasuarina pinaster'' ★ ''Allocasuarina portuensis''[3] ★ ''Allocasuarina pusilla'' ★ ''Allocasuarina ramosissima'' ★ ''Allocasuarina rigida'' ★ ''Allocasuarina robusta'' ★ ''Allocasuarina rupicola'' ★ ''Allocasuarina scleroclada'' ★ ''Allocasuarina simulans'' ★ ''Allocasuarina spinosissima'' ★ ''Allocasuarina striata'' (small bull-oak) ★ ''Allocasuarina tessellata'' ★ ''Allocasuarina thalassoscopica'' ★ ''Allocasuarina thuyoides'' ★ ''Allocasuarina tortiramula'' ★ ''Allocasuarina torulosa'' (forest sheoak) ★ ''Allocasuarina trichodon'' ★ ''Allocasuarina verticillata'' (drooping sheoak)[4] ★ ''Allocasuarina zephyrea''

References

1. Allocasuarina glareicola - endangered species listing Department of Environment & Conservation (NSW). Retrieved 2007-01-23.
2. Allocasuarina littoralis www.organicmatters.com.au. Retrieved 2007-01-23.
3. Allocasuarina portuensis Department of the Environment and Heritage. Retrieved 2007-01-23.
4. Allocasuarina verticillata Windmill Outback Nursery, 2003-03-13. Retrieved 2007-01-23.

External links

★

★ She-Oak Woodland & Forest (Tasmania Government)

★ Research team from IRD working on Casuarinaceae