Sound on film.
"This color film, released in partnership with the International Film Bureau Inc., presents the identifying features of trees as they change through the seasons. The bud and leaf scars of the deciduous broad-leaved trees are examined, as well as the distinguishing features of their bark. The cones and needles of the narrow-leaved evergreens are also described and compared. Extensive time-lapse photography shows the emergence of new leaves and flowers as spring arrives. Size, shape, and the arrangement of the buds and leaves on the twig are presented as ways of distinguishing and identifying trees, " via SUNY College of Environmental Science and Foresty.
Terrence J. Hoverter Archives, SUNY College of Environmental Science and Forestry