Asplenium rhizophyllum

Asplenium rhizophyllum

''Asplenium rhizophyllum'', the walking fern, is a frequently-occurring fern native to North America. It is a close relative of ''Asplenium ruprechtii'' which is found in East Asia and also goes by the common name of "walking fern".
Walking Fern - Asplenium rhizophyllum Elongated leaves that tapered to a point and had a midrib. Underside had sporangia. 

Habitat: Growing in moss in a boggy forest.
https://www.jungledragon.com/image/78339/fern.html
https://www.jungledragon.com/image/78340/fern.html Asplenium rhizophyllum,Geotagged,Spring,United States,walking fern

Appearance

''Asplenium rhizophyllum'' is a small fern whose undivided, evergreen leaves and long, narrow leaf tips, sometimes curving back and rooting, give it a highly distinctive appearance. It grows in tufts, often surrounded by child plants formed from the leaf tips. The leaves of younger plants tend to lie flat to the ground, while older plants have leaves more erect or arching.
Walking Fern - Asplenium rhizophyllum Elongated leaves that tapered to a point and had a midrib. Underside had sporangia. 

Habitat: Growing in moss in a boggy forest.
https://www.jungledragon.com/image/78339/fern.html
https://www.jungledragon.com/image/78341/fern.html Asplenium rhizophyllum,Geotagged,Spring,United States

Naming

The leaf shape and proliferating tips easily distinguish ''A. rhizophyllum'' from most other ferns. Its hybrid descendants share the long-attenuate leaf tip, but are more deeply lobed. An artificial backcross between ''A. rhizophyllum'' and ''A. tutwilerae'' was closer to ''A. rhizophyllum'' in morphology, but still remained some lobes in the basal part of the blade, had a shallowly undulating, rather than smoothly curved, leaf edge in the apical part, showed a maroon color in the stipe up to the base of the leaf blade, and possessed the abortive spores of a sterile hybrid. ''A. ruprechtii'', the Asian walking fern, also possesses attenuate, proliferating tips, but has a lanceolate leaf blade, which tapers to a wedge at the base rather than forming a heart shape. ''A. scolopendrium'', the hart's-tongue fern, has larger, longer leaves that are glossy with a rounded tip.
Walking Fern - Asplenium rhizophyllum Elongated leaves that tapered to a point and had a midrib. Underside had sporangia.  

Habitat: Growing in moss in a boggy forest.
https://www.jungledragon.com/image/78341/fern.html
https://www.jungledragon.com/image/78340/fern.html Asplenium rhizophyllum,Geotagged,Spring,United States,fern

Distribution

The principal range of ''A. rhizophyllum'' is in the Appalachian Mountains and the Ozarks. It can be found from southern Quebec and Ontario along the Appalachians and Piedmont southwestward to Mississippi and Alabama, along the Ohio Valley and into the Ozarks west to Nebraska and Oklahoma, and along the Mississippi Valley north to Wisconsin and Minnesota. It has become extinct in Maine and Delaware. The distribution typically follows area of limy soil; sometimes said to be rare, it is better described as locally abundant where conditions favor it.

Status

Walking fern grows on shaded boulders, ledges and in crevices, usually covered with moss. On rare occasions, it is found on fallen tree trunks, as an epiphyte, or on the ground. It is usually found on limestone or other alkaline rocks, rarely on sandstone or other acidic rocks.

While globally secure, it is endangered in some states and provinces at the edge of its range. NatureServe considers it critically imperiled in Mississippi, New Hampshire and Rhode Island, imperiled in Michigan and South Carolina, and vulnerable in North Carolina and Quebec.

Habitat

Walking fern grows on shaded boulders, ledges and in crevices, usually covered with moss. On rare occasions, it is found on fallen tree trunks, as an epiphyte, or on the ground. It is usually found on limestone or other alkaline rocks, rarely on sandstone or other acidic rocks.

While globally secure, it is endangered in some states and provinces at the edge of its range. NatureServe considers it critically imperiled in Mississippi, New Hampshire and Rhode Island, imperiled in Michigan and South Carolina, and vulnerable in North Carolina and Quebec.

References:

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Status: Unknown
EX EW CR EN VU NT LC
Taxonomy
KingdomPlantae
DivisionPolypodiophyta
ClassPolypodiopsida
OrderPolypodiales
FamilyAspleniaceae
GenusAsplenium
SpeciesA. rhizophyllum