A Moral Alphabet: U

U for the Upas Tree, that casts a blight
On those that pull their sisters' hair, and fight.
But oh! the Good! They wander undismayed,
And (as the Subtle Artist has portrayed)
Dispend the golden hours at play beneath its shade.

MORAL.
Dear Reader, if you chance to catch a sight
Of Upas Trees, betake yourself to flight.