Charles V. (Charles Vancouver) 1 Piper
Flora of the Northwest Coast, Including the Area West of the Summit of the Cascade Mountains, from the Forty-Ninth Parallel South to the Calapooia Mountains on the South Border of Lane County, Oregon
Flora of the Palouse Region. Containing Descriptions of All the Spermatophytes and Pteridophytes Known to Grow Wild in the Area Within 35 Kilometers of Pullman, Washington