Notes. 
230 
starch, but the nectaries continued to excrete for a time. There was 
not the slightest indication of any connexion between the mode of 
disappearance of the starch and the arrangement of the laticiferous 
tubes. The starch gradually disappeared from the ground-tissue of 
the basin, remaining longest near the margin. Thus physiological 
evidence confirms the conclusion suggested by the anatomical fact 
that but few branches of the laticiferous tubes are distributed to the 
nectary. Unfortunately in this plant the ground-tissue is intermingled 
with the conducting parenchyma in such a manner as to render the 
nectaries somewhat unfavourable objects for tracing the exact track of 
the starch in the parenchyma. But the method here suggested may 
possibly be applied with greater success by others who have at their 
command a larger choice of laticiferous plants which possess nectaries. 
PERCY GROOM, Oxford. 
