The head honcho of the Central Park Conservancy infuriated the operator of Wollman Rink this week by bragging about an op-ed she wrote bashing the city and the firm to her board.

Conservancy CEO Elizabeth “Betsy” Smith, however, seemed to have forgotten that the company in question, Related Companies, is on her board — and did not take kindly to her braggadocious diss, according to a letter exclusively obtained by The Post.

“Making unfounded and inflammatory accusations about a member of your own Board—and then bragging about it here—is truly something to behold,” Related Companies’ CEO Jeff Blau wrote in a scathing letter sent back to Smith and the board in response to her Tuesday op-ed in the Daily News .

Wollman Rink in Central Park has been operated by Related Companies since the

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