characteristic of inheres in absent endosperm endospermless This is also an endosperm quality trait (TO:0000587). An endosperm morphology trait (TO:0000575) which is the absence of endosperm (PO:0009089) in the seed (PO:0009010) or grain. ENDMIN (related) TO:0000231 TO_GIT:133 plant_trait_ontology endosperm morphology trait endosperm quality