328 BOTANICAL GAZETTE 
The following table shows the starch contents of Cinnamo- 
mum sericeum and Litsea japonica in autumn, winter, and spring. 
It will be noticed how rich in starch these two plants are dur- 
‘ing the winter. 
Name | Date Pal, Spon. . 
October 6 3-4 3-4 
Cinnamomum sericeum ....... January 31 4 4 
: i 5 5 
' September 7 4-5 , 
Pe OIE es ck eco ss January 18 5 5 
April 25 5 5 
Thus among eighty species examined, the amount of starch 
in winter varies greatly in different species, the relation of the 
starch contents to the number of species being as follows: 
Starch contents - - - oe 2 4 § 
Number of species - ~ 97 28 mie a 
The majority of the evergreen plants were found to contain | 
more or less starch in the: mesophyll during the winter, though 
the amounts are generally much smaller than those at other tenet : 
of the year. Only about one-fifth of the whole number of species 
examined became entirely free from starch, while some species 
__ were quite rich in starch during the coldest time of the y mee 
It can be seen, moreover, that the amount of starch during 
the winter does not depend much on the family to which the ase . 
_ belongs. Taking members of Lauraceae, for example: cae 
_ nobilis has very little starch in the mesophyll during mig: 
_ Winter; Actinodaphne lancifolia has a little more, Cinname ie 
camphora is moderately rich, Cinnamomum sericeum \S richer, a ; : 
Litsea japonica is very rich in starch. However, the — i s 
of all the ferns that I have examined’? was entirely ae aa 
starch in midwinter, although the guard-cells always -“ 
‘some starch. . 
a Generally speaking, the amount of starch in the 
mesoph 
begins to decrease in November and reaches its mint A 
Besides the species of ferns already mentioned, I have = . in 
varians, A. tripteron, A. lacerum, Pteris serrulata, and Lygodium } ee 
_ Coldest time of winter. 2 
ae 
