Some tree sap can be poisonous to people. It depends on what tree(s) you are wanting to find the answer to.
Most palm tree species have sap that is poisonous to dogs. The elephant ear palm is actually a philodendron, not a true palm tree. Philodendron are poisonous to both dogs and humans.
The candelabra tree is poisonous the sap will blister you if on contact with your skin touching the tree will burn your skin even breathing its fumes can burn you ferociously
No This is a poisonous tree - the sap of this tree will blister the skin so its not advisable to stand beneath this tree while raining.
No! Rubber is made from the sap of the tree and is poisonous. The fruit will likewise be dangerous to eat.
A black alder is a variety of tree, Alnus glutinosa, of many practical uses, or the wood which grows on this tree.
No, the alder is not coniferous. It belong to the birch family Betulaceae.
Lick the sap off of the tree.
What causes the sap on a Linden tree? and what can I do?
They are Alder Flea Beetles.
No, it is not :) You can chew it, it has very nice and light taste, a bit sourish but still very good. Used to chew it when was little
I think the better question is: why do you have tree sap in your hair?