The reproductive structure of an angiosperm is the flower.
Flowers differ in their shapes, colors, and sizes. They range in
form from the simple buttercup to the complex orchid. Although
there is a great diversity in their form, most flowers have the
same basic parts.  The receptacle, which is located at the base
of the flower, is the structure to which all flower parts are
attached. The receptacle also connects the flower to the rest of
the plant. The small leaflike structures above the receptacle
are the sepals. All the sepals together form the calyx. Inside
the sepals is a ring of brightly colored structures, the petals.
All the petals together form the corolla. The corolla is usually
the most noticeable part of the flower. Inside the corolla are
the male reproductive structures, the stamens. Notice taht each
stamen contains an anther, and a filament. The anther is the
structure in which the male gametophytes, or pollen grains, are
produced. The filament is a long thin stalk that attaches the
anther to the