Bonners Ferry herald. [volume] (Bonners Ferry, Idaho) 1904-current, 1909-03-20

from year to year we must pFopA-
gate the plants In some way.
There are two principal ways OF
doing this-by seeds and by divisions
Of the plant itself. The most impor-
tant of these is by seeds, as It IL In
this way that most of the ordinary
farm crops are multiplied.
In order to understand this process
we must first learn how the seeds are
formed. The tassel of the corn Is the
male flower and the silk the female.
Some plants, such as certain varieties
of Strawberries, have only female
flowers and must be planted In alter
nate rows with varieties which have
plants the male and female flowers
are combined in one. This LIS the case
with the apple and many other fruits
In the apple the stamens. or male
parts, grow in a ring around the pistii,
or female part, which Is In the center
of the flower. The top Of stamen,
which is expanded, is called the an
Their. This contains a yellow dust,
the pollen.
The upper portion Of the pistil Is
called the stigma. From Ii tube
called the style leads downward to
the ovary. This ovary contains one
or more egg shaped cells called ovules.
Each of these ovules Is capable OF de-
yeloping into seed II fertilized with
pollen grain. When q grain Of pol
len alights on a ripe stigma 1t Is held
by a sticky substance secreted there
1t soon germinates and sends long
threadlike projection down through
the style to the ovary. This slender
projection enters the ovary, and the
resultant union of the male and female
elements causes seed to develop.
One pollen grain is required for each
ovule, and each ovule develops into q
separate seed There are many thou
sand pollen grains produced by each
stamen, and as there are several sta
mems for each pistil you will see that
a great excess of pollen is produced.
This Is one of natures methods OF
making reproduction more certain.
In flowers like the apple the pollen
may sometimes fall directly on the
stigma in the same flower. More often,
however the stamen and pistils ripen
at different times. The object Of this
is to prevent self fertilization, which, If
long continued, will weaken the y1tali-
ty Of the coming generations. Cross
pollination-that Is, the fertilization OF
the ovule Of one flower by the pollen
from another plant-unites the strength
Of both parents and produces larger
harder seed.
This has been proved by many exper'
iments If the tassels are pulled from
row of corn before they have time t.
shed their pollen, the silks must neces
sarily be fertilized by pollen from 9th
err stalks The cross pollination VII
cause the detasseled rows to produce
heavier and larger ears. If this proc
ess is continued from year to year the
yielding power Of that particular strait
will be considerably increased.
In such plants as corn the wind car
ries the pollen for rods in every direc
ton The air in the cornfield is 81
filed with the yellow dust that there II
seldom any danger that the silks vii
fail to catch more than plenty to fer
tilize each Of the many ovules that arr
to form the future kernels.
Some plants, however, are not so for
tunate in this respect. The pollen o
fruit trees is carried to some extent b.
the wind, but not nearly so much .
as that Of corn. In such plants a