I love books! You don’t need all the books below to learn about wildflowers, but there’s a world of knowledge between their pages.
The links below are affiliate links, letting you purchase these books from independent booksellers. I receive a small commission at no cost to you if you purchase after clicking the link.
Botany in a Day: The Patterns Method of Plant Identification by Thomas J. Elpel
Montana Native Plants and Early Peoples by Jeff Hart (Author), Jacqueline Moore (Illustrator)
Wildflowers of Montana by Donald Anthony Schiemann
Free Online Resources
Free dichotomous key to vascular plants of west-central Montana published by the forest service
Free checklist of Montana vascular plants from the Montana Heritage Program
Montana Wildflower App for iOS and Android: This app is great learning more about plants, giving you an informative field guide in your pocket that you can use offline.
Other Faves
Of course I have to recommend my Water Bottle Field Guide Sticker for the Northern Rockies as a great general guide you can take with you anywhere, without having to be glued to your phone!