118 BOTANICAL GAZETTE [aveust 
division is longitudinal (4, fig. 5). This is followed by another 
longitudinal division which is at right angles to it. Each of the 
eight cells thus formed is then divided into two slightly unequal 
cells by a longitudinal division (e, fig. 5). The first longitudiml 
wall is often inclined so that the top cell. (c, fig. 5) resembles 
very much a two-sided apical cell. The remaining divisions at 
Meeks Ay 12) 
Soe 
if ke pean vt 
4 
‘ 
| 
al section. X 600. 7 
Fic. 5.—Embryo. a, 4, very young stages in longitudin 300. ah 
somewhat older. X 480. d, longitudinal section of still older stage x 
transverse sections. X 480. | 
very irregular and are difficult to follow. The young go 
takes on a more and more elongated form. Finally, the 
portion almost ceases to grow, so that the embryo ae 
dumb-bell-shaped (a, fig. 6). The upper portion is t form 
archesporium, and at about this time, or even earlier (d, J 
a definite row of cells, which becomes the capsule we 
formed around the outside. Usually, the first transverse df 
marks the separation of the capsule and the foot, but 
cases (d, fig. 5) this cell remained undivided after the ie 
longitudinal divisions, so that at the base of the embry¢ 
four large cells. : 
Soon after the capsule wall is formed the archespor P 
can easily be distinguished, for their protoplasm becomes: 
