Yes vitamin C is a good one to have around! And zinc is a good one as well. But someday we may solely have to rely on finding it in a natural source as well. I just picked up this bad boy to add to the library!
https://www.amazon.com/gp/product/1402767153/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1It does not list out vitamins, but with this book and some research hand in hand; you could find what plants you need for your nutritional value. It also lists if there any poisonous look a likes and how to prepare the plant for eating. It's a keeper! :-)
I have this book! Great read!