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Semi-thin sections of Hamelia patens anthers. (A) Microspore mother cell stage, showing the cell layers of the anther wall and the microspore mother cells. (B) Tetrad stage, the tapetal cells become vacuolated, the ML flattened. (C) Uninucleate microspore stage, showing free microspores and cell layers of the anther wall. (D) Bicellular pollen stage, showing PG and FT in the endothecium. Scale bars in (A–D) represent 25 μm.
