The stamen is the pollen-producing reproductive organ of a flower. Collectively, the stamens form the androecium.
Stamens of a Hippeastrum with white filaments and prominent anthers carrying pollen
Hippeastrum flowers showing stamens above the style (with its terminal stigma)
Closeup of stamens and stigma of Lilium 'Stargazer'
Cross section of a Lilium stamen, with four locules surrounded by the tapetum
A sporangium ; pl.: sporangia) is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. Virtually all plants, fungi, and many other groups form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in land plants and many fungi, sporangia produce genetically distinct haploid spores by meiosis.
Photomicrograph of a mature sporangium of an Absidia mold
Moss sporangia (the capsule and the stalk/seta make up the diploid asexual sporophyte generation)
Sporangia (clustered in sori) on a fern leaf
Scanning electron micrograph of fern leptosporangia