asparagus fern noun5 •Any of several plants in the genus Asparagus which are grown for their ornamental fern-like foliage. •Asparagus aethiopicus (Sprenger's asparagus), of southern Africa. •Asparagus densiflorus of southern Africa. •Asparagus setaceus (syn. Asparagus plumosus, common asparagus fern), of tropical and southern Africa. •Asparagus virgatus, of tropical and southern Africa. formsasparagus ferns