stamen, pistil, carpel

Stamens and pistils are respectively the male and female reproductive organs of the flower. A stamen typically consists of a filament bearing two chambered anthers which contain pollen. The pistil consists of one or more carpels, each consisting of an ovary, style and stigma. When there is only one carpel, the term carpel and pistil are synonymous; a compound pistil is made up of two or more carpels.

pistil Figures are from Gray's Lessons in Botany and Vegetable Physiology, 1880, Chapter XII.

FIG 172. A pistil, enlarged; the ovary cut across to show the ovules within.

For more on flower structure, please consult The Flower (a page on the website of the Robert W. Freckmann Herbarium) and Kew Information Sheet #4 (PDF document).

 inner parts of flower

Center of a flower of Amelanchier arborea. There are 20 stamens and a compound pistil composed of 5 carpels. (Click on image for a larger version.)

stamen

FIG 170. A stamen: a, the filament; b, the anther, discharging pollen.
FIG 171. A pistil divided lengthwise, showing the interior of the ovary, a, and its ovules, d; b, the style; c, stigma.