88 BOTANICAL GAZETTE [AUGUST 
stage. After completion of the elongation, the corresponding 
average length is 37.14. These averages show an increase of 22 
per cent. in length of diameter of the cells of pseudoparenchyma 
during elongation of the receptaculum. 
Experiment 7.— On October 14, an egg just beginning elonga- 
tion at 1:00 P.M. had partially elongated to the length of 83" 
at 2:30 p.M.. The plant was then split longitudinally into 
halves. Sections were cut from the stipe of one of these halves, 
and measurements of its pseudoparenchyma were taken as in 
Experiment 6. The measurements are given in the column on 
the left below. The other half was suspended in the supporting 
apparatus in a moist atmosphere and had completed its elonga- 
tion at 4:00 P.m., October 15. It then measured 113™™ in 
length. Sections were cut from its stipe; the measurements of 
their pseudoparenchyma are given below in the column on the 
right. 
Before completion of elongation. After completion of elongation, 
mn B 
70-6 28¢ 
22 36 
52 x 40 (46) 48 x 40 (44) 
Longitudinal wall 24 Longitudinalwall 32 
220H thick, next to 28 240m thick, next to 44 
central cavity of stipe 40 x 28 (34) central cavity of 48 
and midway between 32 stipe and midway 44 x 28 (36) 
angles. 4o x 56 (48) between angles. 36 x 34 (35) 
28 Average, =. 3759 
20 
28 
Average, 2 30 
'26 x 40 (33)c 48 x 40 (44)¢ 
44 x 36 (40) 4o x 32 (36) 
Longitudinal wall 40 Longitudinal wall 44 x 32 (38) 
240m thick, next to 32 240 thick, next to 56 x 64 (60) 
central cavity of stipe 44 central cavity of 36 
and near cross wall, 32 stipe. 36 x 48 (42) 
52 x 48 (50) 
40 
40 x 32 (36) 28 x 40 (34) 
