284 BOTANICAL GAZETTE. | November, 
its color, which is slightly reddish, and different from the 
rest of the surface. This is the first beginning of the wing; 
the tissue soon spreads from one lenticel to another until a 
ridge is seen extending along the upper surface of the inter- 
node. It is not possible to say that the wing always takes its 
rise from the lenticels, in this way, as instances of its origin 
between the Jenticels, then spreading out so as to include them — 
afterward, may have been overlooked. No such cork tissues 
were found entirely disconnected from the lenticels. An- 
other fact pointing to the lenticellular origin of the wing is, 
there were several examples, where, for some lack of favor- 
able conditions, the wing formation had stopped with the 
growth of cork immediately under the lenticels in such a 
manner that a number of these, lying in almost a straight line 
n the upper side of several successive internodes, were 
raised up from the surface for a distance of one or two milli- 
meters. Usually there was only one ridge of cork at first; 
often, however, there were several smaller ones branching 
off, so that when developed a number of wings stood out at 
different angles. 
opment about each lenticel takes place in such a manner that 
instead of one connected line along the internode, several 
are formed ; these often join each other at different points SO 
that closed furrows are formed, the number of ridges, OT 
wings, thus being increased to three, four, and even five; in 
the last case they nearly encircle the stem. : 
ose wings breaking along the openings of the Jenti- 
cels, which have been described as normal, there occurs also 
another break which separates the wing from the remaining 
Ussues. This is a break along the edges of the band of corky 
