The Arboretum bulletin - Arboretum Foundation (Seattle, Wash.) ([University of Washington, 1955)

The Arboretum bulletin - Arboretum Foundation (Seattle, Wash.) ([University of Washington, 1955)

The Bulletin of the Native Plant Society of Oregon - Native Plant Society of Oregon. (The Society, 2011)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1951)

An illustrated flora of the Pacific States: Washington, Oregon, and California - Abrams, Le Roy, 1874 -1956 (Stanford University Press, 1951)

Native Plant Society of Oregon - Native Plant Society of Oregon. (The Society, 2009)

Native Plant Society of Oregon - Native Plant Society of Oregon. (The Society, 2009)

Torreya - Torrey Botanical Club. (Torrey Botanical Club, 1932)