The Universal Edibility Test is important to follow before consuming foraged foods. Many wild plants, berries, shrubs, flowers, and trees taste great - but they can also cause serious health problems if not tested first. Always test a new foraged food before eating.
When researching wild edibles it is mission critical to always use resources that use botanical names. There are far too many errors out there so you should always double if not triple check your sources to be on the safe side.
Long time California forager Christopher Nyerges has been a survival skills educator for forty years. His newly released Guide to Wild Plants and Useful Plants is a terrific book for those interested in learning how to identify wild edibles.