whole plant microgametophyte plant_anatomy 2011-03-23T11:32:19Z 小配偶体 (Japanese, exact) rwalls microgametofito (Spanish, exact) PO:0025280 The microgametophyte in bryophytes only produce sperm cells, but do not develop from microspores, because there is no heterospory in bryophytes. In seed plants the male gametophyte is reduced to a pollen grain. PO_GIT:318 A whole plant (PO:0000003) in the gametophyte development stage (PO:0028003) that produces plant sperm cells (PO:0000084). male gametophyte (exact)