Here is a quick list from the national park service of edible plants:
Shortstyle Onion - Allium brevistylum
Fireweed - Epilobium angustifolium
Wild Ginger - Asarum caudatum
Meadow Salsify - Tragopogon pratensis
Rose - Rosa woodsii
Yellow Pond Lily - Nuphar polysepalum
Cattail - Typha latifolia
Yarrow - Achillea millefolium
Evert's or Elk Thistle - Cirsium scariosum
Serviceberry - Amelanchier alnifolia
Wild Strawberry - Fragaria vesca
Field Mint - Mentha arvensis
Oregon Grape - Berberis repens
Here is a quick list of poisonous plants:
Ferns And Their Allies
Horsetails and Scouring Rushes - Equisetum spp.
Bracken Fern - Pteridium aquilinum
Flowering Plants
Monkshood - Aconitum columbiana
Baneberry - Actea rubra
Dogbane - Apocynum androsaemifolium
Milkweed - Asclepias speciosa
Locoweeds and Milkvetches - Astragalus spp.
Water Hemlock - Cicuta douglasii
Poison Hemlock - Conium maculatum
Fitweed - Corydalis caseana
Hound's Tongue - Cynoglossum officinale
Larkspurs - Delphinium spp.
Steer's Head - Dicentra uniflora
Spurge - Euphorbia spp.
Klamath Weed or St. Johnswort - Hypericum perforatum
Mountain Laurel - Kalmia polifolia
Lupines - Lupinus spp.
Cherries - Prunus spp.
Buttercups - Ranunculus spp.
Poison Ivy - Rhus radicans
Elderberry - Sambucus cerulea
Tansy Ragwort - Senecio jacobaea
Nightshade - Solanum dulcamara
Tansy - Tanacetum vulgare
Stinging Nettle - Urtica dioica
Corn Lily - Veratrum californicum
Cocklebur - Xanthium strumarium
Death Camas - Zygadenus
The poisonous ones could come in handy too.
