Answer: Here is a website for Red Butte Garden at the University of Utah. They specialize in regional/native plants, so I bet they could provide you with a list, or give you the names of specific books on native plants. My references focused on Arizona or New Mexico, or the Southwest in general, so if you want to be sure you have Utah natives, check with them.
Another good resource is state parks departments, forestry departments, or the National Parks. They usually carry regionally-specific books or information, and may know of local native plant societies, which can be a tremendous source of information and sometimes free plants (as gardeners save seed or pot up seedlings, etc.). They are also usually in tune with reliable local suppliers. Even the big bookstore chains usually have native plant books.
Here are a couple of good sources of plant material that I have been impressed with:
Seeds: Wild Seed, Inc., PO Box 27751, Tempe, AZ, 85285, 602-276-3536. Call or write for a free list of over 100 wildflowers.
Plants: A High Country Garden at http://www.highcountrygardens.com/ is a terrific nursery in New Mexico. Order their free catalog, which contains lots of information about the plants they offer.
If you find info on a native plant that you can't find a supplier for, please send another email to the Q&A site (not to my email address) and we can do a plant source database search for you. Good luck with your native garden!
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