230 The Botanical Gazette. (April, 
ter during the first divisions of the embryo, after whichit begins 
to divide in basipetal order. When the embryo beginstoshow 
cotyledons, the suspensor, with the exception of the so-called 
‘“thypophysis, "contains a row of from two to four cells. Whenthe 
growing cotyledons have given the embryo the characteristic 
cordate form, the number of suspensor-cells is also found to 
have been increased. The ‘‘Anschlusszelle,” or suspensor 
cell next the embryo, plays a special réle. The other sus- 
pensor cells divide in somewhat irregular fashion, but in this 
one the first wall is vertical, and vertical divisions follow in 
planes at right angles to each other. This does not agree 
with Fleischer’s account of Helianthus, in which the Ar 
schlusszelle has two transverse walls before vertical divisions 
begin. A little later, vertical divisions occur in the cell be- 
low the Anschlusszelle. The descendants of these two cells 
take part in the formation of the embryo, which by this add- 
tion has become nearly spherical. —CHAS. CHAMBERLAIN. 
Correlation effects following mechanical hindrance of 
growth. 
was removed from a seedling, the growth rate of i nd 
exceed that of the control objects. of 
By use of Pfeffer’s method of confining parts 11 pa 
Paris casts, the author investigated the action resulting 
mechanical hindrance of the growth of a system, oF of af 
0 
* Ueber Wachsthumscorrelationen in Folge mechanischer Hemmug 
Wachsens Pringsh. Jahrb. £. wi : 
: vane . : IO: & 
* Annals of Botany j: 265. 1 sang Botanik 29: 132-17 
