Australian Blackthorn
ExplorePlants
Australian Blackthorn
bursaria spinosa
Australian Blackthorn (Bursaria spinosa) is a hardy, woody shrub or small tree native to eastern and southern Australia. Known for its thorny branches and sweet, jasmine-scented white flowers, this resilient plant plays a vital ecological role in dry sclerophyll forests and grassy woodlands. During mid-summer, it erupts in a sea of creamy-white blooms, earning it the alternative name 'Christmas Bush' in southern regions. This dramatic flowering event acts as an insect magnet, drawing in thousands of native bees, wasps, and butterflies. Beyond its beauty, the dense, prickly structure of Australian Blackthorn provides crucial protective nesting sites for small woodland birds, shielding them from larger predators. Its deep root system and ability to regenerate from a lignotuber make it exceptionally drought-tolerant and a key player in land reclamation and soil stabilization.
Habitat: Found in a wide range of dry sclerophyll forests, open woodlands, coastal scrublands, and pastures across eastern and southern Australia.
Appearance
This species typically grows as an erect, thorny shrub or small tree between 2 to 8 meters tall. It is characterized by small, wedge-shaped to obovate green leaves, up to 2.5 cm long, clustered along fine, rigid branches heavily armed with sharp thorns. In summer, it produces dense, terminal panicles of tiny, five-petaled white flowers that emit a sweet, honey-like fragrance. These flowers are succeeded by distinctive, flattened, heart-shaped or purse-like seed capsules that turn from green to a dry, papery brown when mature.
KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderApialesFamilyPittosporaceaeGenusBursaria
Category
PlantsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
During the colonial era, the sweet fragrance of its mid-summer blooms earned it the local moniker of 'Christmas Bush' in Tasmania and Victoria.
The genus name 'Bursaria' is derived from 'bursa', the Latin word for purse, which refers to the unique shape of its flat, heart-shaped seed pods.
The leaves of the Australian Blackthorn contain a substance called esculin, which was historically extracted and studied for its ability to absorb ultraviolet light.
Special abilities
Ability
Lignotuber Regeneration
Possesses a woody underground structure that allows the plant to vigorously resprout after intense bushfires or severe grazing.
Ability
Spiny Defensive Armor
Develops sharp, needle-like thorns along its branches to deter large herbivores from feeding on its foliage.
Ability
UV-Absorbing Foliage
Produces esculin in its leaves, a natural chemical compound that helps absorb harmful ultraviolet radiation.
Measurements & details
- Length
- 200-800 cm
- Lifespan
- 20-60 years
Diet & Feeding
As a photosynthetic plant, it synthesizes its own food using sunlight, carbon dioxide, water, and soil minerals.
Primary Foods
- Sunlight
- Carbon dioxide
- Water
- Soil nutrients
Ecological connections
host plant
Eltham Copper Butterfly
Paralucia pyrodiscus lucida
Hosts caterpillars of this endangered butterfly, which feed exclusively on its leaves.
host plant
Imperial Blue Butterfly
Jalmenus evagoras
Caterpillars feed on the foliage of the blackthorn while being attended by mutualistic ants.
mutualism
European Honeybee
Apis mellifera
Feeds on the rich nectar produced by the summer blooms, aiding in cross-pollination.
Traits
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Also known as
No aliases listed yet.
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Australian Blackthorn?
The easiest way to identify Australian Blackthorn is to use the Snappit nature identifier app.
How long is Australian Blackthorn?
200-800 cm
How long does Australian Blackthorn live?
20-60 years
What does Australian Blackthorn eat?
As a photosynthetic plant, it synthesizes its own food using sunlight, carbon dioxide, water, and soil minerals.
Where is Australian Blackthorn usually found?
Found in a wide range of dry sclerophyll forests, open woodlands, coastal scrublands, and pastures across eastern and southern Australia.
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