128 BOTANICAL GAZETTE [FEBRUARY 
in contact, thus forming a tube which extends down to the 
plumule and in some cases is quite long. In the light of Lyon's ~ 
work on Nelumbo, the tube surrounding the plumule suggested | 
to Campbell the possibility of a like origin of the cotyledons in 
these forms and a lateral origin for the plumule as in monccoty- 
ledons. ; 
In the light of these facts, and because of our limited knowl- 
edge of the embryology of the so-called anomalous dicoty- 
ledons, it seemed desirable to study the embryology of several 
of these forms. 
As the Berberidaceae include peculiar and varied plants, mae 
of which differ widely from the typical Berberis, it was decided 
to begin work on certain representatives of that family, in which 
it seems that little of importance has been done on the develop- 
ment of the embryo. Holm (1899) has traced the development of 
Podophyllum peltatum from the seedling to the flowering plant, and 
both Dickson and Lubbock have observed the seedlings of Podo- 
phyllum Emodi, the Asiatic form. All agree in the description of 
along cotyledonar tube with a very small plumule at the bottom, 
second year. Holm makes the 
statement that the cotyledons really represent a single leaf of 
this plant. 
COLLECTION AND METHODS. 
Material for all stages in the development of the embryo of 
and JSeffersonia adiphylla, together with ripe 
orange G. In this manner all] 
morphological and cytological 
details are clearly brought out, 
