1897] WMORMAL AND DISEASED ORGANS OF ABIES BALSAMEA 325 
calls the ring of this tissue in A. pectinata the wall of the cup, 
the pith septum being its bottom. The wall of this cup sur- 
rounds the growing point in winter; the youngest inner bud 
scales grow from thisannulus. That this annulus of thick walled 
tissue at the base of the innermost scales does not form a part 
of the internodal pith septal layer is shown by the fact that the 
xylem and phloem cells of the last year’s internode extend up, 
and separate the septum from the basal swellings of the inner 
scales ( fig. ze,a). In older internodes it is found dried up in 
the outer bark, together with the remains of the bud scales. 
The thick walled area of the basal swelling of the inner scales is 
composed of from 6 to Io layers of cells of parenchymatic ori- 
gin, shown by their pitted walls. That this annulus of strengthen- 
ing cells, together with the pith septum, forms an additional pro- 
tection to the bud in its winter condition, there can be no doubt. 
TABLE Iil. 
Bud Diameter piste a Lemeiees 
no. Position inmm. | exposed! scales | of scales 
I Terminal on erect shoot 4 20 mid 
A) 2 + io ‘“ 4% 20 10 30 
5 3 Axillary on erect shoot 2% 17 7 24 
3 4 ra ‘“ ‘“ ‘sc 23 19 8 27 
£ 5 Terminal on lateral shoot 236° | 6 8 93 
it 6 “ ss “ 6% 4 19 7 26 
a j Axillary on lateral shoot 2 16 9 25 
8 “ & ts “ I K&B 18 6 24 
as 
= 8 
= I Terminal 2% 30 ie Ge 
a a “ 2% 27 9 36 
z 4 “ 3 29 7 36 
@ 4 Axillary 1% 25 oe 
3 5 “ 1% a 3 34 
& f.6 “ , +e 24 oe as 
Sti erat | b Serene re 
_ 2. Diseased buds.—The diseased buds are more numerous, 
_ “orter, and somewhat larger than the normal. They are covered 
ae with a layer of resin, and in this respect are well protected. Like 
ae Normal buds their scales have no epidermal hairs. The dis- 
“ased buds are covered over with a greater number of bud scales 
