As in past years, I'm limiting this list to northern North America for two reasons:
- Restricting this list geographically is in keeping with my specialization in plants native to northeastern North America.
- There are many more tropical plants, and plant extinctions, than I can manage.
In 2020, this paper:
Vascular plant extinction in the continental United States and Canada
caused me to expand my list from 6 to 59 species, including 7 extinct in the wild. The summary is terse, and grim:
