 Plants with heads that have florets of two or more sexual forms are called heterogamous and include radiate and disciform head forms, though some radiate heads may be heterogamous too.Ferns typically produce large diploids with stem, roots, and leaves; and on fertile leaves called sporangium, spores are produced.The spores are released and germinate to produce short, thin gametophytes that are typically heart-shaped, small and green in color.