=== Pistillate and Staminate === A flower is pistillate if it possesses only pistils, which are a plant's female reproductive structures. If it possesses only stamens (the male reproductive structures), it is called ''staminate''. === Monoecious and Dioecious === [[File:Tagalder8139.jpg|thumb|250px|left|The '''Alder''' is '''monoecious'''. Shown here: maturing male flower catkins on right, last year's female catkins on left]] [[File:Hollyflowers.jpg|300px|right|thumb|'''Holly''' (''Ilex aquifolium'') is dioecious: (above) shoot with flowers from male plant; (top right) male flower enlarged, showing stamens with pollen and reduced, sterile stigma; (below) shoot with flowers from female plant; (lower right) female flower enlarged, showing stigma <br />and reduced, sterile stamens with no pollen]] <br style="clear:both">
