Pollen grains (microgametophytes) are produced in the pollen sacs.
{"Image DocumentName": "Pollen grains (microgametophytes) are produced in the pollen sacs.", "Image ImageDescription": "Each anther usually contains four pollen sacs, or microsporangia, which are often confluent (joined) in two pairs. The pollen sacs are joined to each other and to the filament by a connective. Pollen grains (microgametophytes) are produced in the pollen sacs.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}