Sweet Bursaria (Blackthorn)
Bursaria spinosa subsp. spinosa
- A woody shrub to small tree, usually with thorny branches.
- Size: 5 – 10 m high.
- Leaves: glabrous, dark green, 20 – 44 mm long and 5 – 9 –mm wide.
- Flowers: White, 6 – 10 mm wide, fragrant
- Fruit/seed: 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.
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)
ClimateWatch Science Advisor
Warmer, wetter summers will extend the flowering period. May increase seed set and could extend the range of the species if pollinators are available.
When To Look
- December to July
- Flowering: December – February in NSW
- Fruiting: June – July in NSW
Where To Look
- Open Eucalypt woodlands from coastal to alpine regions
- NSW, QLD, VIC, SA, ACT
The map below displays the accumulated observations of these species as reported by ClimateWatch observers, together with the layer showing how the range of the species might change between now and 2085, with orange areas indicating where the species might disappear, and green areas where the species range might expand.
Bursaria spinosa subsp. lasiophylla is another subspecies that is similar but found in eucalypt woodlands with heavier soils. Often found at higher altitudes in tablelands or low mountain ranges in SE Australia.
Did You Know?
Resprouts after fire
Often found with Pittosporum Beetles (Lamprolina aenipennis)crawling on it.