The Revelator reports
A new paper documents 65 such plant extinctions — five small trees, eight shrubs, 37 perennial herbs and 15 annual herbs — the losses of most of which have never been reported before. Most of these species had limited ranges or were known from single sites, and likely went extinct following the destruction of their habitats. A few were lost due to dams, invasive species or overgrazing.
Read article at: How Many Plant Species Have Gone Extinct in North America? • The Revelator
Natural History Wanderings 
Interesting article – but the paper that it references might not be entirely accurate. It lists Arctostaphylos franciscana, for example, but that has been “rediscovered”: http://cnps-yerbabuena.org/franciscan-manzanita-arctostaphylos-franciscana/
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By: CCRussell on October 15, 2020
at 12:51 PM
Thanks for the correction.
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By: Sandy Steinman on October 18, 2020
at 10:09 PM