A
macro shot of the interior of an
Echinopsis spachiana flower, showing both
carpels (center) and
stamen (forming a ring around the carpels), making it a "complete flower", a term used in describing
plant sexuality. Flowers, the reproductive structures of
angiosperms, are more varied than the equivalent structures of any other group of organisms, and flowering plants also have an unrivalled diversity of sexual systems.
Photo credit: Fir0002