Structure of pistil and stamens in the section at the time of double fertilization premium vector by mariaflaya

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white vector background illustration isolated female plant pollen flora flower botany structure cross egg part biology section double stamen scheme anatomy diagram english reproduction pistil filament title fertilization anther morphology ovule stigma integument ovary angiosperm diploid cross section egg cell gametophyte botanical illustration antipodals megagametophyte micropyle phytomorphology parts of plant female gametophyte nucellus double fertilization embryo sac polar nuclei

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