It's a big thorn, but it isn't very sharp. Mesquite thorns are way worse than that.
Looks like it might be from the honey locust tree
https://en.m.wikipedia.org/wiki/Honey_locust
Their thorns were big enough to puncture tractor tires in the 70s and 80s or straight through the rubber of a work boot. Not to mention the thorns have an irritant that feels wonderful.
I am familiar with them. And Mesquite. The Mesquite thorns are WAY sharper. As in probably sharper than needles sharp. And I have seen 6" ones radiating out from the trunks. And of course they have poison on them that aches pretty bad, especially if it's a deep flesh poke, like one that bounces off the bone.
https://i.ibb.co/HDmKJV6/Lonesome-Dove-Jake-Gone-Mad-From-Mesquite-Thorn.jpg
This here is a branch that I just trimmed off. Sapling branch. Less than a year old. Solid 2" needles all up and down it.:
https://i.ibb.co/Hdp5S0X/Typical-Mesquite-Thorn-01.jpg
I try to keep the trunk ones knocked down in the trees I manicure near the house, so I don't have a pic of one. Maybe later if I head out back.
I agree with you on the mesquite. I have a tree in my yard called Sweet Acacia. That while the thorns don't get as long as mesquites. They are WAY more numerous.
Ah okay. Mesquite isn't too common in my area.
I still remember my Dad getting a thorn stuck through a pair of work boots.
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