Se Te eg ee 
Bh ot i? ak a ee ea ia 
Sees 
aete 
1888. | BOTANICAL GAZETTE. 257 
oe stem, and the narrow plate cells, y, were formed, 
Se ia nt v around the stem. In most cases, how- 
Be ie os 2a able that growth of the entire phellogen 
aii S.cayeetgetgr 8 in the season than in the case of the 
Rae the ‘oy i figure 8 was taken, and that, for some 
ras Five Sas ind of tissue is produced as that forming the 
he Nhe s, viz: phelloid tissue, referred to on the figures 
of Pinte cell some time the fall growth occurs and the ring 
of plate cells, y, is formed. This must have been the case 
sentation of a section 
eted wings examined 
ro ds 
process forms the furrow. This is, therefore, given to prove 
ile it 1 bable 
the é t 
Ss oega as that of the first periderm section 
e, at this time, extends in some cases enti 
thi : si 
is mantle of thicker walled cells ; in the specime 
ct between the ring of 
n the winter 
cell s of the surrounding plate- 
cells, and they break regularly along the lines of the prece@- 
uring the sum- 
ee ogg that they are perfectly regu 
roe on nearly all the older branche 
to ognized, and the little hollow furrow ru 
P of each wing may be plainly seen- F. 
