250 The Botanical Gazette. (Joly, ' 
icate and almost indistinguishable. In fig. 11 the synergide 
on the left showed disorganization, the nucleus being smaller 
and vacuole larger. 
Development of the embryo. 
The fertilized egg, oospore, increases in size, becomes 
slightly elongated, and develops a more definite membrane 
(fig. 12). The posterior part (that directed toward the micro- 
pyle) now protrudes slightly into the micropyle to serve a 
an organ of attachment. The nucleus increases now greatly 
in size as does the endosperm nucleus also. The synergide 
are almost entirely absorbed; their remains are shown in the 
figure. The oospore now divides near its upper end (that 
directed away from the micropyle) by a transverse wall intoa 
terminal hemispherical cell and a basal cylindrical cell (fig. 13). 
The terminal cell forms the greater part of the future embryo, 
while the basal cell forms the suspensor and a part ofthe em- 
bryo. This differs from that which obtains in Capsella® in 
that the oospore does not elongate into a tube which first d- 
vides by a number of cross walls to form the suspensor. Here 
the suspensor remains shorter; it is composed of fewer cells 
and the divisions take place later. At this stage of a : 
in the cavity 
’ This terminal cell of the embryo, after further incre vee rg 
size, divides into halves by a longitudinal wall. ‘he 
lowed by a second longitudinal wall at right angles to fc 
first, as will be seen in a cross section of the same atasi® 
stage of development (fig. 19). A third wall, transverse 
lows at right angles to the first two. The termin i to the 
now divided into eight cells, which may be comp .. mbryo 
octants of a sphere. From the upper half - fc? i 
s 
which is cut off by the transverse wall, procee ‘on of the 
the epicotyledonary (plumule and cotyledons) Pay radi) 
embryo, and from the lower, the hypocoty pee js cut 
portion. At this stage of development (fig- sie 
off from the upper end of the suspensor by 4 tion 
This cell, +, subsequently contributes to the forma 7“ é 
periblem of the root, the root cap and suspensor rminal 
walls mentioned above which divide the original te 
*Goebel: Outlines of Classification and Special Morp 
lation, 1887, Pp. 396, 397, 398. 
has 
verse 
trans of the ie 
pology, English 
