https://www.wildflower.org/plants/result.php?id_plant=pain6

https://www.tnstate.edu/extension/documents/Bitter%20melon%20fact%20sheet.pdf

https://www.stetson.edu/other/gillespie-museum/media/ethnobotany%20-%20Spanish%20needle.pdf

https://pmc.ncbi.nlm.nih.gov/articles/PMC3712223/

https://mrec.ifas.ufl.edu/research/weedsbyflowercolor/white/bidensalba/

https://www.flawildflowers.org/flower-friday-bidens-alba/

https://www.eattheweeds.com/elderberries-red-white-and-blue/

https://www.fs.usda.gov/wildflowers/plant-of-the-week/sambucus_nigra_l.shtml

http://www.minnesotaseasons.com/Plants/American_elderberry.html

https://www.eattheweeds.com/spiderwort-pocahontas-and-gamma-rays/

https://www.holisticlivingschool.org/2019/07/15/august-spiderwort/

https://plantersplace.com/perennials-forever/spiderwort-and-its-many-uses-in-the-garden/

https://edis.ifas.ufl.edu/publication/HS100?downloadOpen=true

https://nwdistrict.ifas.ufl.edu/hort/2020/08/14/muscadines-our-florida-wild-grape/

https://edis.ifas.ufl.edu/publication/MG050

https://gardeningsolutions.ifas.ufl.edu/plants/trees-and-shrubs/trees/loquat/

https://gms.ctahr.hawaii.edu/gs/handler/getmedia.ashx?moid=3065&dt=3&g=12

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books:

Roadside Rambles (2001) Ila Hatter

The New Healing Herbs (1995) Michael Castleman

general info:

https://plants.usda.gov/plant-profile?symbol=pain6