270 
Garden Work 
Pollen Grains 
some of the tissue inside the lobes, and when they are 
matured they are simply minute cells capable of an inde- 
pendent existence for some time. When the anthers are 
matured, the tissue 
at certain parts 
simply dries up and 
bursts, thus liberat- 
ing the large num- 
ber of little rounded 
cells — the pollen 
grains — which we 
see and can lift off 
with the point of 
a knife. Many of 
these pollen grains, 
when examined 
under the micro- 
scope, are found to 
be covered with 
little spines, while 
some actually have 
wings, enabling 
them to float about 
in the atmosphere. 
The pistil con- 
sists of an ovary at 
the base, which is 
made up of one or more large cells. In each of these 
cells we have little bodies, some rounded, some flat. These 
are the ovules. On the top of the ovary there is some- 
times a long, stalk-like process. This is the style. On 
