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The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916

Microspore Cells

The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers…

The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers and pollen grains or microspores of Silphium." -Stevens, 1916

Microspore Cells

The sporogenous cells (s), tapetum (t), two parietal layers (oo) in the stages of "formation of anthers…