DALLAS — In a decade as president of the Federal Reserve Bank of Dallas, Richard W. Fisher was frequently mistaken in his economic predictions but seldom boring.

The departure of Mr. Fisher, who stepped down on Thursday, means that the Fed is losing one of the most outspoken internal opponents of its stimulus campaign just as it is winding down. Mr. Fisher argued right up to his retirement that the central bank was increasing economic inequality, destabilizing financial markets and might yet unleash higher inflation. But he is best known not so much for what he said as for the way he said it.

He spoke more often and more colorfully than any of his colleagues at the Federal Reserve, larding his speeches with quotes, anecdotes and metaphors. Among the most memorable was his 2012 description of his breeding bull, Too Big to Fail, as full of liquidity but unable to reach the pretty cows on the other side of the fence.

“His speeches have regularly been the most eloquent — a true joy to read his somewhat excessive Texas exuberance in explaining both the successes and the possible excesses of monetary policy,” the former Fed chairman Paul A. Volcker, a mentor to Mr. Fisher, said in a recent introduction.