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

Asplenium, genus Asplenium - in some classification systems placed in family Polypodiaceae

Asplenium adiantum-nigrum, black spleenwort - spleenwort of Europe and Africa and Asia having pinnate fronds and yielding an astringent

Asplenium platyneuron, ebony spleenwort, Scott's Spleenwort - common North American fern with polished black stripes

black-stem spleenwort, black-stemmed spleenwort, little ebony spleenwort - fern of tropical America: from southern United States to West Indies and Mexico to Brazil

Asplenium rhizophyllum, Camptosorus rhizophyllus, walking fern, walking leaf - ferns having lanceolate fronds that root at the tip

Asplenium trichomanes, maidenhair spleenwort - small rock-inhabiting fern of northern temperate zone and Hawaii with pinnate fronds

Asplenium viride, green spleenwort - small often many-crowned fern with slim green fronds; widely distributed in cool parts of northern hemisphere

Asplenium montanum, mountain spleenwort - a spleenwort of eastern North America

Asplenium ruta-muraria, wall rue, wall rue spleenwort - small delicate spleenwort found on a steep slope (as a wall or cliff) of Eurasia and North America

Asplenium bradleyi, Bradley's spleenwort - a spleenwort of eastern to southern United States

Asplenium pinnatifidum, lobed spleenwort - a spleenwort of eastern and southern United States

Asplenium billotii, lanceolate spleenwort - a spleenwort of western Europe