Original: Sporangia, also known as sporanges (sing., sporange), can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically unique haploid spores.
Simplified: Sporangia can produce asexual spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis, and produce genetically unique haploid spores.