Foraging wild plants has varying rules depending on the region.
Consult local law resources to be sure of the regions you can safely and legally forage.
Below is a general base to start with from "Edible Wild Plants in Northwestern Ontario: A Primer", but always consult local people and law enforcement agencies for better knowledge of your areas.
Basic Rules of Edible Wild Plant Collection
• Be sure you know what you are picking, and eat only plants you can positively identify as edible. It’s best to spend time with a local expert, but many books and even local courses or workshops can be helpful.
• Harvest plants in areas where you know there is low risk of contamination from industrial and other pollution.
• Try eating small quantities of any plants you haven’t eaten before.
• Make sure you have the property owners’ permission before collecting plants on private property. Also, part of best practices includes contacting the local First Nation community.
• Most importantly, take only what you can use and use what you take. Edible wild plants are a shared resource. We need to make sure they will return year after year.
"Community Horticulture Fact Sheet 73A Edible Wild Plants"
Basic rules of Wild Food Collection:
•Know what you are picking
•Collect only what you can positively identify as edible
•Harvest only plants that look healthy in areas uncontaminated by pesticides
•Clean and prepare wild foods like you do cultivated crops
•Eat only small quantities when first trying an edible plant
•Get property owners permission before gathering wild foods
•Never over-harvest. Take only what you can use and use what you take.
Field Guide to Edible Wild Plants
http://www.americaismyname.org/uploads/7/9/1/7/7917170/field_guide_to_edible_wild_plants.pdf
Wild Edible Plants
http://www.urbanfarmhub.org/wp-content/uploads/2013/03/Wild-Edible-Plants.pdf
Edible and Medicinal Plants
http://old.greatbaikaltrail.org/sites/default/files/edible-and-medicinal-plants.pdf
Wild Edibles of Missouri
https://nature.mdc.mo.gov/sites/default/files/downloads/page/WildEdibles.pdf
Pocket Urban Foraging Guide
http://www.wildfoodschool.co.uk/urban/wfsURBANGUIDE.pdf
Edible “Wild” Plants of Southeast Ohio
Some Tips for the Wild Foods Forager
http://www.employees.csbsju.edu/ssaupe/essays/edible_wild_plants.pdf
Native Plants for Edible Landscaping
http://www.goodoak.com/info/EdibleWildPlants.pdf
Edible Wild Plants
Wild Edible Plants of the Midwest
https://web.extension.illinois.edu/mg/conference2012/files/Wild_edibles_Deb_Lee.pdf
Edible Plant List (Native and Naturalized)
https://extension.msstate.edu/sites/default/files/topic-files/flower/edible.pdf
Edible Wild Plants
National Science Teaching Standards
https://www.iowadnr.gov/portals/idnr/uploads/education/ediblewild.pdf
Edible Wild Plants of West Michigan Volume 1
https://kcfnb.org/zines/edible_wild_west_michigan_v1.pdf
The Edible Landscape
https://wateruniversity.tamu.edu/media/1080/edible-landscape-11-1-16.pdf
Plant Guide
https://plants.usda.gov/plantguide/pdf/cs_sacu.pdf
A Guide to Medicinal Plants of Appalachia
https://www.fs.fed.us/ne/newtown_square/publications/research_papers/pdfs/scanned/OCR/ne_rp138A.pdf
U.S.Army Chapter 9: Survival Use of Plants
Edible and Medicinal Plants
http://www.nativeplantconsulting.com/Edible%20and%20Medicinal%20Plants.pdf
Edible Wild Plants in Northwestern Ontario: A Primer
https://ontarionature.org/wp-content/uploads/2017/10/wild-edibles.pdf
Harvesting and Processing Edible Wild Plants
Best Practices Guide
Wild Edible Notebook
June
https://wildfoodgirl.com/wp-content/uploads/2011/06/wild-edible-notebook-June_sm.pdf
USEFUL WILD PLANTS OF THE UNITED STATES AND CANADA
http://www.swsbm.com/ManualsOther/UsefulPlants/Useful_Wild_Plants-1.PDF
The Incredible Edible Desert
Edible Wild Plants Native to the Northeast U.S. and Eastern Canada
Illustrated Guide to Edible Wild Plants
Department of the Army
https://ia800305.us.archive.org/35/items/isbn_9781585746613/isbn_9781585746613.pdf
Edible Plants (some common Colorado plants)
http://bsa16.org/v3/wp-content/uploads/2011/04/survivorman-packet---edible-plants.pdf
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Food Preservation Section
Preserving Food Without (Canning) Refrigeration with Kelley Wilkinson
https://www.youtube.com/watch?v=LUQxrnEFzB0
How To Can with a Brake Bleeder -No Heat, No Electricity Canning = GENIUS!
https://www.youtube.com/watch?v=4sceVvxxluw
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If you wish to request a book for your specific region, feel free to do so in a comment and will add it to the list for others in the future.
Shalom
Great resources brother. We might need that knowledge in a very near future.