![Botany, with agricultural applications. Botany. STAMEN 461 Stamen. — The stamen (miorosporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen grains ( Botany, with agricultural applications. Botany. STAMEN 461 Stamen. — The stamen (miorosporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen grains (](https://c8.alamy.com/comp/RDTG16/botany-with-agricultural-applications-botany-stamen-461-stamen-the-stamen-miorosporophyll-has-its-pollen-sacs-microsporangia-usually-four-in-number-joined-into-the-struc-ture-called-anther-the-pollen-grains-microspores-are-numer-ous-in-each-sac-and-are-formed-before-the-flower-opens-like-the-spores-of-gymnosperms-pteridophytes-and-bryophytes-they-are-formed-by-special-cells-known-as-mother-cells-of-which-there-are-many-in-each-pollen-sac-as-shown-at-a-in-figure-408-these-mother-cells-also-divide-by-the-reduction-division-that-is-by-the-kind-of-cell-division-in-which-t-RDTG16.jpg)
Botany, with agricultural applications. Botany. STAMEN 461 Stamen. — The stamen (miorosporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen grains (
![Lilium - composite of images of the gynoecium : cross section of the ovary, pistil in profile, ovule with megaspore mother cell, four-nucleated embryo sac, mature 8-nucleated 7-celled embryo sac - UWDC - Lilium - composite of images of the gynoecium : cross section of the ovary, pistil in profile, ovule with megaspore mother cell, four-nucleated embryo sac, mature 8-nucleated 7-celled embryo sac - UWDC -](https://asset.library.wisc.edu/1711.dl/XTLNNTXHEJIUZ82/M/h1380-c3d55.jpg)
Lilium - composite of images of the gynoecium : cross section of the ovary, pistil in profile, ovule with megaspore mother cell, four-nucleated embryo sac, mature 8-nucleated 7-celled embryo sac - UWDC -
![This is Microspore Anther Lobe view. In flowering plants microspore mother cells are formed within the pollen sacs of the anthers by mitosis, the micr Stock Vector Image & Art - Alamy This is Microspore Anther Lobe view. In flowering plants microspore mother cells are formed within the pollen sacs of the anthers by mitosis, the micr Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/T61GF7/this-is-microspore-anther-lobe-view-in-flowering-plants-microspore-mother-cells-are-formed-within-the-pollen-sacs-of-the-anthers-by-mitosis-the-micr-T61GF7.jpg)