Readers discuss the IRS barring tax claims against the Trump family and businesses, alongside topics of conservation and native plants. The focus is on an audit related to a significant tax refund claimed by Donald J. Trump.

Readers respond to news that the I.R.S. would be barred from pursuing tax claims against President Trump, his family or his businesses. Also: Protecting precious places; growing native plants. The audit dated back to a $72.9 million tax refund that Donald J. Trump claimed, and received, starting in about 2010.