Eucalyptus patens

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Swan River blackbutt
Eucalyptus patens from "Eucalyptographia. A descriptive atlas of the eucalypts of Australia and the adjoining islands"; (1879) (20165942804).jpg
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Eucalyptus
Species: E. patens
Binomial name
Eucalyptus patens
Yarri redirects here. It can also mean Queensland Tiger. For the Aboriginal hero, see Yarri (Wiradjuri)

The eucalyptus tree Eucalyptus patens has been known as yarri, blackbutt, Swan River blackbutt and Western Australia blackbutt.


The tree typically grows to a height of 3 to 25 metres (10 to 82 ft) and has rough textured bark that is longitudinally furrowed. It produces white-cream inflorescences between July and August or November to February.[1] The canopy grows to a width of around 8 metres (26 ft).[2] One specimen of the tree located near Nannup has been recorded with a height of 43 metres (141 ft) with a canopy of 20 m (66 ft).[3]

It is similar to the jarrah (Eucalyptus marginata) and it is usually found in jarrah forests alongside this tree.[4]

This species is considered to be one of the main six forest giants in Western Australia along with jarrah, marri, karri, red tingle and tuart trees.[4]


It is endemic to the southwest of Western Australia. The species grows well in gravelly soils with sandy clay or loam. It is often found in depressions, along stream banks or in valleys in the Peel, South West and Great Southern regions.[1] It grows well in winter wet areas and other permanently damp locations.[2]


It is in short supply as a harvestable timber[5] as significant areas of its distribution are now covered by conservation reserves.[6] In addition, even in forest where timber harvesting is allowed informal reserves placed around streams exclude Eucalyptus patens which predominantly occurs in the wetter parts of the landscape.[1]

It is a viable tree to cultivate - and numbers of publications and websites have clear information on cultivation well away from its normal habitat[7]

The species is drought and frost resistant an the flowers are good as a source for the production of honey.[4]

See also[edit]


  1. ^ a b c "Eucalyptus patens". FloraBase. Western Australian Government Department of Parks and Wildlife. 
  2. ^ a b "Eucalyptus patens 'Swan River Blackbutt'". Ellenby Tree Farm. Retrieved 15 October 2017. 
  3. ^ "Tree Details". National Register of Big Trees. Retrieved 15 October 2017. 
  4. ^ a b c "Eucalyptus patens". Apace. Retrieved 15 October 2017. 
  5. ^ "Trees". Department of Agriculture and Food. 
  6. ^ "Forest Management Plan 2014-2023" (PDF). Department of Conservation. 2014. 
  7. ^ "Eucalyptus patens". Australia Plants. 

External links[edit]