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Looks like a fungal growth, with clear stripes and wavy margins.
Growing amongst the top branches of a casuarina(female, about 2M) which is about 4 years old. Landcare site Merewether NSW, not far from coast.
Spotted on Aug 3, 2021
Submitted on Aug 3, 2021
3 Comments
Agree with Syzygy, these are part of the plant's flower structure. Nothing fungal here.
Check this one for reference on another casuarina species:
"Abnormal phylloclad modification of Casuarina equisetifolia."
https://www.researchgate.net/figure/Abno...
I see no fungus, but modified tissues of the plant. Somewhat makes me remember of tumorous growths by saguaro cacti.
http://joeorman.shutterace.com/Bizarre/B...
Probably it is made by some insect or some other factors (infections?), but I think, sure it is not "the fungus" what we see on these great shots!