In January 1973, when the Flora North America Program was suspended for lack of funds, work was well underway on a revision of the “Provisional Checklist of Species for Flora North America,” issued in September 1972 as FNA Report 64.
In January 1973, when the Flora North America Program was suspended for lack of funds, work was well underway on a revision of the “Provisional Checklist of Species for Flora North America,” issued in September 1972 as FNA Report 64.