43 § 
Note. 
Starch was tested for in material that had been picked for several days. It was 
found in the endodermal layer to the outside of the pericyclic sclerotic fibres, but in 
no other tissue. Starch was also tested for in material that had just been picked 
after half an hour's bright sunshine. In this case abundant starch was found in the 
palisade and cortical cells, in the pericyclic parenchyma bordering on the sieve tubes, 
and in the medullary rays. No starch could be detected in the cells of the pith. 
The following is a list of the plants examined, with a general account of the 
distribution of chlorophyll in their young shoots. In all cases, with the exception of 
the evergreens, the material was cut when the leaf-buds were just bursting. 
Plant. 
Tilia europaea , Linn. 
Aesculus Hippocasianum , 
Linn. 
Beiula alba , Linn. 
Carpinus Be/ulus, Linn. 
Acer Pscudoplatanus , Linn, 
Ulmus campesiris , Linn. 
Popidus nigra, Linn. 
Fag its sylvatica, Linn. 
Fraxinus excelsior , Linn. 
Qnercus Robur, Linn. 
Pyrus amygdaloides , Linn. 
Rosa canina , Linn. 
Crataegus oxyacantha, Linn. 
Primus spinosa , Linn. 
Rubus, sp. 
Laburnum vulgare , J. Presl. 
Robinia Pseudacacia, Linn. 
Chlorophyll developed in 
Cortex, medullary rays, and the pitted medullary cells 
bordering on the protoxylem. 
Cortex, scantily in the medullary rays, and in the 
medullary cells bordering on the protoxylem. 
Cortex, medullary rays, and throughout the medulla 
which is of small size. 
As in Beiula alba. 
Cortex, medullary rays (especially in the very broad 
ones), and in the medullary cells bordering on the 
protoxylem. 
Cortex, medullary rays, and in the thickened medullary 
cells bordering on the protoxylem. 
Cortex, medullary rays, and in the medullary cells 
bordering on the protoxylem, especially where scler- 
enchymatous. 
Cortex, medullary rays, and thickened medullary cells 
bordering on the protoxylem. 
Cortex, medullary rays, and thickened medullary cells 
bordering on the protoxylem. 
Cortex, scantily in the medullary rays and the medullary 
cells bordering on the protoxylem where sclerenchy- 
matous. 
As in Quercus Robur . 
Cortex, and in the cells surrounding each bundle. 
Cortex, medullary rays, medullary cells bordering on 
the protoxylem. 
Cortex, medullary rays, and thickened medullary cells 
bordering on the protoxylem. 
As in Prunus spinosa . 
Cortex, scantily in the medullary rays, and in the medul- 
lary cells bordering on the protoxylem. 
Cortex, medullary rays, scantily in the thickened medul- 
lary cells bordering on the protoxylem — particularly 
clear in the pericyclic parenchyma. 
