These field notes provide a descriptive account of the tree population in areas of the Washington Territory, which during this time included Washington State, Idaho, and parts of Montana and Nebraska. The notes were taken in approximately 1860. They are dated from 6 August of an unknown year to 13 October of the next year. Gibbs notes the existence and abundance of several plant species as he travels through the Territory. Most specimen listed include pine and spruce varieties (family: Pinaceae ). Notes are narrative and diary like, describing tree density, locations, environment, and binomials found. Specific locations include Kootenay River, Spokane River, and the Rocky Mountains (within Washington Territory).
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