Natural distribution map for the North American "Sambucus nigra" (black & blue elderberry) subspecies: *"Sambucus nigra" subsp. "canadensis" (green, from Little's "S. canadensis" map and red from Little's "S. mexicana" Presl map) *"Sambucus nigra" subsp. "cerulea" (dark blue, from Little's "S. glauca" map and light blue from Little's "S. velutina" map)