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Notes (historical):
The Picea glauca albertiana forma conica is a dwarf cultivar that is especially popular in gardens. This "dwarf variety" was found by "Professor Jack near Laggan in Alberta in 1904," and many specimens were cultivated from it. The "Professor Jack" in question is John George Jack (1861-1949), who worked at the Arboretum as lecturer in arboriculture in 1891 and went to Alberta, Canada in 1904 with Professor Alfred Rehder, where they discovered the dwarf white spruce, Picea glauca conic. It is conic, compact, and in 1921 the largest one in Boston was no more than 2 feet high. It is easily and quickly propagated from cuttings and a favorite in rock gardens ("A Dwarf Spruce," Arnoldia, June 14, 1921; Electric Scotland Website, entry for "John George Jack," 10. http://www.electricscotland.com/history/world/jack_john.htm; Arnold Arboretum website "John George Jack," http://arboretum.harvard.edu/library/image-collection/botanical-and-cultural-images-of-eastern-asia/john-george-jack/).
