682 Campbell. — Studies on the Araceae. 
and, as might be anticipated, the suspensor is very rudi- 
mentary. 
The first division is transverse and cuts off a small pointed 
basal suspensor-cell, which, however, undergoes very little 
further growth. The next divisions are probably not always 
exactly the same. Usually the second wall is vertical (Fig. 
45) and divides the embryonal cell into two nearly equal 
parts. Sometimes before this vertical wall is formed an 
oblique wall may cut off a small cell (Fig. 46) in contact 
with the suspensor-cell. The latter does not always show the 
pointed form which usually distinguishes it. Following the 
first vertical wall in the embryonal cell, there are usually two 
transverse walls, intersecting it and dividing the embryo into 
nearly equal quadrants, and these maybe divided into octants, 
although it is not probable that this is always the case. Figs. 
49-52 represent nearly median sections of embryos of about 
the same age, showing the variation in form as well as in 
the cell-arrangement and the character of the rudimentary 
suspensor. 
For a long time there is no evidence of the development 
of the external organs, nor is it possible to trace any definite 
relation between these and the earlier divisions of the embryo. 
The stem-apex arises in a lateral depression at a point a little 
below the middle of the embryo, the region below developing 
the hypocotyl and root, the part above, the cotyledon (Fig. 53). 
In the origin of the organs of the embryo, Spathicarpa does 
not differ essentially from the commonest type of the Mono- 
cotyledons. The tissues of the embryo remain almost per- 
fectly homogeneous, and even in the root, where the arrange- 
ment of the tissues is most regular, the limits of the different 
tissue systems are very imperfectly defined. At the root end, 
in the most advanced embryo, there may be seen the rudi- 
mentary suspensor, and although the tissues are somewhat 
better defined than in the embryo of Aglaonema , still they 
are rather vague. The root-cap is not clearly delimited, nor 
are the meristems below it at all clearly defined. Some 
evidences of a central strand can be made out, above which 
