Palm trees are interesting. The particular variety growing near us, hides its flowers/fruit behind a thin skin that is wrapped around the trunk of the tree for about two feet and ends in the classic palm frond. This is all invisible and protected until the appropriate time, when the entire palm leaf/branch crashes to the ground, taking the trunk-girdling sheath with it. Then the fruiting body is exposed, it then grows to the right size, and opens to let the fruit unfold. When all that falls off, the mark left on the tree is the circular "growth" ring.
This frond is getting set to drop. Note the bulge on the side of the trunk.
The fruiting body exposed.
In full bloom.