Random access identification key covering the vascular plants of Washington State and is based on simple, easy to observe characteristics. In most cases the key will allow you to reduce the number of potential matching species to a manageable level, at which point you can browse through the images and descriptions of those species to find the one that best matches your plant.

Random access identification key covering over 200 species of Washington's deciduous trees, shrubs, and vines - including most of the common species - using characteristics of the twigs, buds, and bark that are visible during the winter, with supplementary characters for leaves and fruits that frequently persist on the plant or on the ground beneath.