ually over 1/2 inch in length.

[Illustration: Fig. 1a Fig. 1b

Shagbark Hickory Terminal Buds (1-X)]

The long attenuated apex on the outer bud scales of the elliptical type
of buds is evident in Figs. 1b and 2b.

[Illustration: Fig. 2a Fig. 2b

Shagbark Hickory Terminal Bud Scales (1-X)]

The number of lateral buds at one position varied considerably with the
usual number being one (Fig. 3a) bud located just above the lobed leaf
scar. On exceedingly vigorous sprout growth, or on very vigorous
terminal growth twigs, it was found that 2, 3, 4 and occasionally 5
superposed buds might occur (Fig. 3b).

Twigs of shagbark varied considerably both in the rapidity of growth and
in color. Frequently the color seemed to be associated with the incident
rays of the sun and orientation of the twig on the branch seemed to
largely control color.

Twigs upon the same tree would vary from gray to reddish brown to
yellowish brown or tan. The majority of observed trees had a reddish
brown as the predominant color. Terminal shoot growth of as much as 40
inches was observed and as little as 2-3 inches in very slowly growing
mature trees.

[Illustration: Fig. 3a Fig. 3b

Shagbark Hickory Lateral Buds (1-X)]

[Illustration: Fig. 4a Fig. 4b

Shagbark Hickory Leaves (1/3X)]

The degree of pubescence on the surface of the twigs varied considerably
and was found to frequently follow group location patterns. Thus nearly
all of the individuals growing in one field might be found with dense
pubescence on the twigs while a similar group several miles away might
have, for all practical purposes, no pubescence on the twigs. In
general, the most rapidly growing trees (or twigs) had the least amount
of pubescence on the twigs.

LEAVES--There was extreme variability found with the leaves of the 158
individual trees observed. All trees were found to have compound leaves,
but the leaflet numbers varied greatly. The typical number for shagbark
is 5, but 3 to 7 were found; three leaflets were common, 5 were abundant
and 7 leaflets were rare. Six cases of leaves with 7 leaflets were
obtained from the vast number of leaves checked on the 158 trees; thus
the frequency of occurrence is quite low for the group as a whole. Where
7 leaflets were observed, 5 of the leaves were normal pinnately compound
leaves (Fig. 4a), while one leaf consisted of five palmately arranged
leaflets plus two normal pinnately compound leaflets (Fig. 4b). The
leaflets