fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

genus Trichomanes, Trichomanes - bristle ferns; kidney ferns

hare's-foot bristle fern, Trichomanes boschianum - a variety of bristle fern

Killarney fern, Trichomanes speciosum - large stout fern of extreme western Europe

kidney fern, Trichomanes reniforme - large fern of New Zealand having kidney-shaped fronds