Because of its age , and because it lacks sepals and petals and its reproductive organs , interpreted as carpels and stamens , are produced on an elongate stem rather than condensed into a flower as in modern angiosperms , Archaefructaceae has been proposed as a new basal angiosperm family .
Its reproductive organs , carpels and stamens , are produced on an elongate stem rather than condensed into a flower as in modern angiosperms . Archaefructaceae has been proposed as a new basal angiosperm family .