422 
CECIL YAMPOLSKY 
plant are essentially like those normally found on a female plant. Female 
flowers when they occur may be found singly on any part of the male plant. 
Towards the close of the growing season there is a marked tendency for 
groups of female flowers to appear closely crowded together on branches 
of certain male plants. Plate XL, figure i, shows very clearly the grouping 
of these female flowers in clusters. The female elements never occupy a 
branch exclusively, but are always associated with male flowers. Some- 
times -one finds a single female flower on an elongated peduncle which is 
rather thin and spindly, but which is from fifteen to twenty times as long 
as the peduncles of the flowers on the female plant. I have found such 
cases only in the lower and older parts of the male plant. 
Plant no. 247 (see table 6) produced the largest number of seeds, 93 in 
all. This plant differed from the other males in its paler green foliage. 
The leaves were somewhat smaller and its general habit of growth was 
sparser, but it showed from the beginning the same general habit as the 
other male plants. The largest number of flowers and seeds was produced 
during the month of August, when 68 seeds were collected. During Sep- 
tember and October there was a diminution in the number, but this plant 
continued to bear seeds until it was killed by frost. The seeds throughout 
the time of their production were found on all parts of the plant, usually 
occurring in groups of two. Aside from its production of the largest number 
of seeds (93), there was no reason in its general appearance for placing this 
plant among the females or monoecious individuals. Approximately 90 
other female flowers were produced which, however, failed to develop 
seeds, and dropped off. Seven plants (see table 6) produced seeds during 
the month of August and produced no more thereafter, although they con- 
tinued to grow vigorously, producing countless numbers of male flowers 
until they were killed by frost in early November. Three plants (see table 
6) began to produce seeds in September. Plant no. 253 produced 4 seeds 
during that month and did not continue to develop any further thereafter, 
although its vegetative vigor remained unimpaired. The other two pro- 
duced seeds until they were killed by frost. Nine plants (see table 6) 
began to produce seeds in October, when the growing season was on the 
decline. Four plants (nos. 242, 245, 248, 249) began to produce seeds in 
August. They produced none in September, but again produced seeds in 
October. 
Altogether there were 29 plants that produced seeds, the number of 
seeds produced varying from i to 93. These plants represent, however, 
about six percent of the total number of male plants under observation, 
of which there were about 500. 
A total of 283 seeds were produced, the highest number, 139, in August, 
the lowest, 52, in September, and 92 in October. Thirty-one seeds were 
immature. In a two-seeded ovary one seed often develaps faster than the 
other, so that in gathering the seeds the immature one is likely to be gathered 
with the mature one. In the act of gathering the seeds nine were lost. 
