Sweet Bursaria Earthwatch Australia

Sweet Bursaria

Bursaria spinosa subsp. spinosa

Did You Know?

  • Resprouts after fire
  • Often found with Pittosporum Beetles (Lamprolina aeneipennis) crawling on it
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Also know as Blackthorn.

A woody shrub to small tree, usually with thorny branches. Grows up to 5 – 10 m high.

Leaves

Glabrous, dark green, 20 – 44 mm long and 5 – 9 –mm wide.

Flowers

White, 6 – 10 mm wide, fragrant.

Fruits/Seeds

Dark brown, flattened capsules in clusters. Each capsule to 7 mm long and 9 mm wide containing on average 4 seeds. Seeds reddish brown, flat and oval to kidney shaped.

Species: WhatToObserve Image

What to Observe

  • First fully open single flower

  • Full flowering (record all days)

  • End of flowering (when 95% of the flowers have faded)

  • Open seed pods containing seeds (record all days)

Climate Adaptations

Warmer, wetter summers will extend the flowering period. May increase seed set and could extend the range of the species if pollinators are available.

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When and Where

When To Look

  • December to July
  • Flowering December to February in NSW
  • Fruiting June to July in NSW

Where To Look

  • NSW, Queensland, Victoria, South Australia, and the Australian Capital Territory
  • Open eucalypt woodlands from coastal to alpine regions
Species: WhatElse Image

What Else?

Similar Species

Bursaria spinosa subsp. lasiophylla is similar but found in eucalypt woodlands with heavier soils. Often found at higher altitudes in tablelands or low mountain ranges in South East Australia.