Cause Of Death? Poem by Ima Ryma

Alexander the Great was crowned
King of most of the world then known.
As conqueror he was renowned,
Ruled a vast empire from his throne.
Legend does tell it was a tree
Was the beginning of his end.
On the Euphrates River he
Was on a boat, rounding a bend.
Alexander did strike his head
Upon a tree limb which did sweep
Off his crown, and soon he was dead.
For him his followers did weep.

When death of Alexander came,
Weeping willow was the tree's name.