The "'Old Jarrah tree "'is an exceptionally large and old " Eucalyptus marginata " ( Jarrah ) tree near inside the carpark the entrance at the corner Third Road and Church Avenue in Armadale, Western Australia.
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Plants possessing lignotubers include " Eucalyptus marginata " ( Jarrah ), most oak species including cork oak " Quercus suber ", but do not develop in several other oak species, and are not apparent in mature cork oak trees.
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The poorer, lateritic soils, about a quarter of the region, are vegetated by medium forest of jarrah " ( Eucalyptus marginata ) ", which can grow up to 40m tall, and marri " ( Corymbia calophylla ) " ( up to 60m ).
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The organisation of the first Walk was also an Australian Bicentenary celebration to appreciate the environment of Southwest Australia, which is home to a relatively small but unique tall forest heritage : the world's only " Eucalyptus marginata " ( Jarrah ), " E . gomphocephala " ( Tuart ) forests grow there.
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The Mount Henry Peninsula is covered by open woodland of tuart ( " Eucalyptus gomphocephala " ), merging into low open woodland of marri ( " Corymbia calophylla " ), jarrah ( " Eucalyptus marginata " ) and the Western Australian Christmas tree ( " Nuytsia floribunda " ), with a very varied understorey the Mount Henry Peninsula is the only remaining bushland on the Swan Coastal Plain which includes plant communities of foreshores, limestone slopes, ridge woodlands and dampland.
