Eucalyptus camaldulensis is one of Australia's most widespread eucalypts. Recent morphological and genetic studies have delineated a number of subspecies that show a broad geographic replacement pattern throughout its range [1,2]. Subsp. obtusa occurs along rivers and creeks of tropical northern Australia . It extends west from the Kimberley region of Western Australia, across Northern Territory to western parts of north Queensland. This is a riverine tree with mostly cream to white bark up to 25 m tall.
Flowering and seeds
Most populations of subsp. obtusa flower during October-November [1,4]. Seed capsules tend to persist on trees until at least the following summer. There are about 750 viable seeds per gram; seeds start to germinate in about 5 days if grown at 25-30°C with no pretreatment required .
Cultivation and uses
Provenances of subsp. obtusa such as Katherine, Northern Territory have been commonly cultivated in a number of overseas countries [5, 6]. Despite natural populations of this subspecies being strictly riparian it grows on a wide range of recharge sites. It is a fast growing, readily established and has mainly been cultivated for firewood, timber and pulpwood .
Mean annual rainfall: 400-1250 mm
Rainfall distribution pattern: summer
Mean annual temperature: 18-34 °C
Mean max. temperature of the hottest month: 34-39 °C
Mean min. temperature of the coldest month: 10-16 °C
Frosts (approx. no. per year): frost free or more or less frost free or up to 20
Frost intensity: light to moderate (0 to -5°C)
Altitude: 30-400 metres
Tolerance of extremes in climate
Drought: known to be moderately drought tolerant
Fire: regenerates foliage after damaging fire
Frost: tolerates frosts in the 0° to -5°C range
Texture: clay loam, heavy clay (greater than 50% clay), light to medium clay (35-50% clay), loam, sandy loam, sandy clay loam or sand
Soil pH reaction: acidic (less than 6.5) or neutral (6.5-7.5)
Soil depth: moderate to deep (30-100 cm or greater)
Drainage: 1. well-drained or seasonally waterlogged
Salinity: slightly to moderately saline or non-saline
Tolerance of adverse soils
Extremes in pH: acidity
Extremes in texture: clayey or sand
Salinity: moderate (-8 dS m-1) or slight (2-4 dS m-1)
Soil waterlogging tolerance: drainage may be sluggish at times
Biological traits under cultivation
Habit: evergreen tree 10-20 m tall, tree > 20 m tall, usually produces a clear trunk
Longevity: moderate to long lived (>15 years)
Growth rate: fast
Coppicing ability: vigorous, responds to pruning, pollarding; lignotuberous
Root system: moderate to deep
Erosion control potential: excellent for clayey sites or excellent for sandy sites
Shade tolerance: grows best in full sunlight
Wood density: mod. to high (greater than 600 kg/cubic metre)
Carbon sequestration potential: high
Potential farm use: good ornamental attributes
Specialty products: flowers produce nectar for honey production, pollen has value for apiculture
Traditional Aboriginal uses: implements/artefacts
Urban use: good as an ornamental or amenity plant
Wood products: craftwood (for turnery etc.), heavy construction, high quality fuelwood, industrial charcoal, speciality timber for quality furniture
 Butcher PA, McDonald MW and Bell JC (in press) Congruence between environmental parameters, morphology and genetic structure in Australia’s most widely distributed eucalypt, Eucalyptus camaldulensis. Tree Genetics and Genomes.
 McDonald MW, Brooker MIH (in prep.) A taxonomic revision of Eucalyptus camaldulensis Dehnh.
 Boland DJ, Brooker MIH, Chippendale GM, Hall N, Hyland BPM, Johnson RD, Kleinig DA, McDonald MW, Turner JD (2006) Forest Trees of Australia. CSIRO Publishing, Collingwood.
 Gunn BV (2001) Australian Tree Seed Centre Operations Manual. Internal Publication, CSIRO Australian Tree Seed Centre, ACT. [Online at http://www.ensisjv.com/Portals/0/atsc-opmanualcomplete.pdf Accessed March 2008]
 Eldridge K, Davidson J, Harwood C, Wyk Gv (1993) Eucalypt Domestication and Breeding. Clarendon, Oxford.
 Marcar NE, Crawford DF (2004) Trees for Saline Landscapes. RIRDC Publication Number 03/108, Canberra.
Alice Spings Town Council: http://www.alicesprings.nt.gov.au/community/environment/recommended_native_plants