28 ARISAEMA TRIPHYLLUM 
while they could yet be identified by the dead leaves, and replanted 
in another pot and left with other cultures in the greenhouse lobby 
until the following April 3, when all were removed to the main 
room of the greenhouse. At this time a leaf had appeared. By 
June 3 all these corms had produced leaves equal in size and vigor 
to the usual third year plants. These plants will, of course, be 
closely watched to determine whether they will remain true to 
their double annual growth. 
After the leaves had died down at the end of the first season of 
growth, the corms were collected, grouped according to size and 
replanted in pots of rich loam. During the second season of growth 
the familiar trifoliate leaves were produced. Examination at 
intervals of a few days showed the following changes in the corms. ` 
With signs of growth about the bud,—lengthening of the investing 
scales and the appearance of roots about their bases,—the lower 
portion of the starchy tissue began to soften. In five to ten 
days the starch had been dissolved by an enzyme, and two weeks 
later only a dry hull of investing periderm remained, the dissolved 
food material having been entirely absorbed. About one fourth 
of the fleshy part of the corm was used up in the growth period. 
See FIG. 48 (PLATE 3) for the portion absorbed by an older corm. 
Microscopical examination at the beginning of this change showed 
a layer of phellogenous cells (TEXT FIG. 28 a) formed through the 
food reservoir and cutting off the portion in which digestion was 
taking place. This new tissue covered the remainder with a close 
coat up to the base of the bud, leaving only passage for the absorb- 
ing vascular strands. At the end of the growing season the corms 
showed a new, large and well-developed terminal bud covered with 
the dry shreds of the dead leaf base. The basal part was covered 
with the wrinkled first periderm. Just at the basal margin of the 
bud scales were one to three lateral buds. A few of the smallest 
corms lacked these buds entirely. Just on a level with the ring of 
lateral buds was a ring of readily noticeable scars where the roots 
had been attached (PLATE 3, FIG. 49). In size the corms measured 
6-15 mm. in length and 3-10 mm. in thickness. This growth 
had occurred in two directions, longitudinally and radially about 
the long axis, and had been accomplished by the production of 
new storage tissue just beneath the terminal bud. 
juice Spee ick Seale e ret ee 
