I've not revisited this thread for a while
but IMHO you should read Thomas Jefferson's Notes of Virginia
https://www.monticello.org/site/research-and-collections/notes-state-virginia
Lewis and Clarks
https://lewisandclarkjournals.unl.edu/
Porcher's Resources of the Southern Fields and Forests
http://waring.library.musc.edu/exhibits/civilwar/PorcherRSFF.php
although you will find much good information in these three documents , My intent in mentioning them is to use them as a Template to start your own personal inventory of the Natural resource around you particular location that you can tap as needed
Porcher would be especially useful in this regard .. for example Quinine used to treat malaria ( and lately made famous as a Presidential cure for Covid), doesn't grow in America , but even back in the Civil War, malaria was a real problem.. The African Slaves of that time were equally susceptible, but did not seen to suffer from it. that was because they recognized a native Tree to the American South that also grew in Africa and that possesses all the medically useful qualities of Quinine . Porcher "stole " that knowledge and used it and many other plants that had the medicinal effects of blockaded plants that would otherwise have to be imported past the Union blockade.
First thing you do in a survival situation is do an inventory of what resources you have ... could take years , best to start now ..
But it's not the specific info on the plants , Porcher also describe where and how to find the plants since many plants prefer a certain type of soil a certain amount of water and sun even certain sides of hills and mountains , dry or wet or in between ground ect.
if you look you will find many useful plants that are complete worthless to folks who don't even know their names , some are weeds in your own yard , some might be the other side of the hill and are only known as a pest in modern Times but were once staples of life in other places and times
The survival book I recommend is your notes on local resources for food and industry .. here in the South we often see Osage oranges laying on the ground under a tree, a tree that provides wood that is vastly superior to Yew for making Bows to hunt with .. all good to know stuff when the stores run out .
If you were to kill maybe Three deer for food, you have also created enough uneaten food to support a human being that those deer would have eaten had they lived .. the trick is knowing which plants that deer eat that you can also safely eat
and only you know the local terrain
even in the suburbs , my favorite example are Redbuds .. it is just a really big pea plant covered with yummy pea pods with edible leaves and flowers to boot , sure would be a shame to starve to death with one untouched in your yard. a note of caution you also need to what parts of a plant at what time of year are safe to eat . Might mention if you have Clover , my favorite is the Red variety supposed to be stronger against cancer folks pay good money for it at the herb shop but aside from that it is also a bean plant ( real tiny beans ) but you can ground up the dried flowers and make a powder that works well to extend you wheat flour for baking and as a bonus it also completes the amino acids in wheat to make a complete protein . I just cut around it when I cut my otherwise totally unfertilized of poisoned lawn .. I also have a lot of that stuff , what's it called?/, that is an antidote for poison ivy .. I'll have to go look it up

just kidding , but you should go look it up for real