382 BOTANICAL GAZETTE [DECEMBER 
succeeding are small, odd-pinnate, with three to seven leaflets. 
Buds are present in the axils of all the leaves, including the 
cotyledons; and in specimens which were injured at the apex, 
several of these buds had grown out into erect shoots (fig. 1). 
In Carya alba and C. glabra (Mill.) Spach the seedlings agree 
with those of Juglans, but the root is fusiform. Moreover, the first 
two or three leaves succeeding the scalelike are unifoliate to tri- 
foliolate, with the terminal leaflet very large, roundish, and far 
surpassing the lateral in size. 
Root 
The primary root of the seedling is stout and fleshy at the base, 
owing to the large development of the parenchymatic tissues, pri- 
mary as well as secondary. The successive development of the 
various tissues may readily be seen in the same root, when examined 
from base to apex. In beginning with the basal swollen portion, 
the structure is as follows. Only some few, more or less broken 
strata of the primary cortex and part of the endodermis still adhere 
to the root, which is now covered by four or five layers of thin- 
walled cork of pericambial origin. Inside the cork is a broad 
parenchyma, the secondary cortex, rich in starch, and interrupted 
by two concentric bands of isolated strands of stereome. The 
stele shows an almost continuous zone of leptome and cambium, 
while the hadrome corresponds with eight distinct mestome strands. 
On the inner flank of the interfascicular cambium some few young 
vessels are visible; moreover, there are four rays of narrow proto- 
hadrome vessels readily distinguishable from the secondary by 
their narrow lumen. The central portion of the stele is occupied 
by a broad starch-bearing pith. In comparing this structure with 
that of the younger apical part of the same root, the following 
distinctions are noticeable. There is a glabrous epidermis, desti- 
tute of root hairs, and the primary cortex is a broad parenchyma 
without starch or crystals. Inside the endodermis is a pericambium 
of a single layer, in which tangential divisions have commenced, 
indicating the beginning formation of the cork (fig. 15, Co). Bor- 
dering on the pericambium is a zone of about eight layers of thin- 
walled parenchyma (fig. 15, C*), representing a secondary cortex. 
