Key to Oak Woodlands

• Oval-leaf viburnum + poison-oak > 10% and each present ................. QUGA/VIEL-TODI



• Common snowberry > 10%
• Douglas-fir > 25% and sword fern present ................ QUGA-PSME/SYAL/POMU
• Oregon ash > 25% ........................................................... QUGA-(FRLA)/SYAL
• Sword fern + enchanter’s nightshade + Siberian springbeauty +
  starry solomon’s seal > 1%
• Riparian or wetland fringe site .................................. QUGA-(FRLA)/SYAL
• Douglas-fir > 10% or Douglas-fir stumps numerous, not a
  riparian or wetland fringe site ......................... QUGA-PSME/SYAL/POMU


• Poison-oak and oceanspray each > 10% ...................... QUGA/VIEL/TODI
• Long-stolon sedge or blue wildrye > 1% ................................ QUGA/SYAL/CAIN
• Common snowberry > 50% or Indian plum > 25% ............... QUGA-(FRLA)/SYAL
• Tall Oregongrape, long-stolon sedge, or blue wildrye present ... QUGA/SYAL/CAIN


• Common snowberry < 10%
• Scot’s broom > 25% ........................................................................ Non-native
• Tall Oregongrape > 25% ...................................................... QUGA/SYAL/CAIN
• Long-stolon sedge, Roemer’s fescue, red fescue, or blue wildrye >10%
  and common camas or western buttercup present .............. QUGA/CAIN-(CAQU)
• Non-native grasses dominate understory ............................................ Non-native




• Not as above .............. try with half the values in the key, review association descriptions

View association table (species list for each association, in MS Excel format) for Oak Woodlands