UPWARD TRANSLOCATION OF FOODS IN WOODY PLANTS II 5 
Koch, Crataegus sp., Acer saccharum Marsh., and Fagus grandifolia Ehrh., 
in^which two rings were made on the same stem some distance apart. 
Stems of Ostrya were ringed April 6. By May 6 growth had started and 
the shoots of the ringed and unringed stems were apparently of the same 
length, measuring for the most part about 15 to 20 millimeters. The shoots 
of the ringed stem, however, had used up most of their reserve food, for 
Fig. 4. Ostrya virginiana ringed April 6 at RR. Cut May 19 and tested for starch 
with iodine. 
Ringed. A. Above upper ring., No trace of starch in any part either in the young 
twigs or in the older stem. 
B. Between rings. Starch very abundant in pith, medullary rays, cortex 
and phloem parenchyma. 
C. Below lower ring. Traces of starch in the pith cells. (See page 116 for 
results as to upper, middle, and lower parts of upper ring.) 
Not ringed. A . Traces of starch in pith cells. 
B . Traces of starch in pith cells. 
C . Traces of starch in pith cells. 
very little further growth took place while the shoots of the check stem 
continued to grow. On May 19 two of these stems were cut and tested for 
starch. For the stem shown in the photograph (fig. 4) the tests were as 
follows: 
Above the upper ring: No trace of starch was present in any part, either 
in the young twigs or in the older stem. 
Between the two rings: Starch was very abundant in the pith, medullary 
rays, and cortex. 
