Renata I can't answer all this.
I noticed it cracking as the day wore on, but its hot here - 28-30°C and things are drying fast.
Definitely viscous to begin.
I wondered where it oozed from and why it appeared like it did and also why, to me it's upside down.
I'd thought the tip would be down not up.
It is hard and goes brittle.
Many trees ooze sap and Wattles here are known for it. Its odd stuff to chew - wouldn't recommend, but I've tried it (Wattle ie)
Someone may give more info.
I'm going to post some images of our gum trees, bark, the way it sheds bark, leaves, scribbly markings on bark....
I'll add this also.
Thanks for the info, Richard. I am somewhat familiar with gum trees and their bark because I spent 12 years in Oz but never paid attention to the sap they ooze out.
But, please, post some. Would be interesting to see some after so many years, though I have seen some here in the US, particularly in California some years ago when I visited.














