The present investigation of the shagbark began in the fall of 1949 and continued through the summer of 1953. It was initiated with the previous knowledge of the extreme variability to be observed between the nuts of individual shagbark hickory trees and was conducted for the purpose of determining whether or not that variability was also expressed through other features of the tree such as buds, leaves, bark or form. Consequently, a systematic study was begun of individual trees totaling 158 found mostly in Onondaga County, New York plus the edges of surrounding counties. The trees were observed throughout the growing season so that the various tree parts could be observed for comparison. It was a preconceived idea by the author that there might be several or more distinct subdivisions into which individuals of shagbark might be placed through the use of macroscopic characters. Observations were made over a period of three growing seasons on the following characters of each tree: (1) bark (2) buds and twigs (3) leaves (4) flowers (5) fruit Each character was observed more than once for each tree as a check on possible yearly variation for specific characteristics in the trees from which data was collected. The generalized description for shagbark hickory is as follows: SIZE--a tree ranging at maturity from 50 to 100+ feet in height, generally 2 to 3 feet in diameter and very occasionally reaching 4 feet in diameter. BARK--usually under 3/4 of an inch in thickness, occasionally up to 1 inch thick with a characteristic light or smoky-gray color when dry and breaking up into long plates or strips loosely attached to the trunk near the middle of the plate. BUDS--terminal buds usually 3/8 to 3/4 of an inch long, subglobose to narrowly ovate, with 8-10 imbricate scales, the outermost of which are a blackish brown with dark brown tomentum, and a short mucronate or attenuate apex, inner scales light brown with longer lanate pubescence and apex acute to obtuse; lateral buds smaller, about 1/4 of an inch with tightly appressed scales. TWIGS--angled or rounded, reddish brown to yellowish brown, or gray, turning more or less gray with age; pubescent the first year. LEAVES--compound--ranging from 3-7 ovate to oblong lanceolate leaflets, usually 5, terminal leaflet as large or larger than the first two laterals, usually 4-8" long, generally glabrous on both surfaces but with a finely serrate, ciliate margin; total leaf size ranging from 8-15" for mature leaves.