June, 1922] FARR — ^ MEIOTIC CYTOKINESIS OF NELUMBO 299 
reduction divisions immediately precede the appearance of pigment in the 
anther, the yellow or orange tinge showing just after the microspores are 
formed. This fact aids much in readily finding the particular stages which 
are desired. After the examination of the pollen mother cells of one or 
Text Fig. i. The bed of Nelumbo lutea from which the material for this study was 
collected. 
more stamens from a flower in living condition under a compound micro- 
scope in the field, other stamens from the same flower were fixed in Flem- 
ming's solution. In this way the desired stages were secured, and a large 
amount of imbedding, cutting, and staining in order to find the right stages 
was eliminated. The tip of the stamen projecting beyond the anthers, 
which is characteristic of this genus, was cut away before fixation in order 
to permit of ready penetration of the fixing solution into both ends of the 
stamens. 
A longitudinal section of the stamen of Nelumho lutea (PI. XV, fig. i) 
shows that the anthers are very long and slender. In most cases there is 
space for not more than four or five pollen mother cells to lie side by side 
across the pollen chamber in its widest place. During the reduction divi- 
sions the mother cells are usually not in contact with each other, but in 
