Nutt.
Identity
Unique IDELEMENT_GLOBAL.2.154268
Element CodePPASP02100
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumFilicinophyta
ClassFilicopsida
OrderFilicales
FamilyAspleniaceae
GenusAsplenium
SynonymsAsplenosorus pinnatifidus(Nutt.) Mickelx Asplenosorus pinnatifidus(Nutt.) Mickel
Other Common Nameslobed spleenwort (EN)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic CommentsFNA (1993, vol. 2), Kartesz (1994), and Weakley and the Southeastern Flora Team (2023) accept Asplenium pinnatifidum, which is a fertile allotetraploid derived from hybridization of A. montanum and A. rhizophyllum. The generic placement of this taxon is in accordance with the Pteridophyte Phylogeny Group I (2016).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2023-09-26
Change Date1989-04-20
Edition Date2023-09-26
Edition AuthorsNordman, C. (2023).
Threat ImpactHigh - medium
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsLobed Spleenwort (Asplenium pinnatifidum) occurs in the eastern United States, in the Appalachians, from New Jersey to Alabama, west into Cumberland and Interior Low Plateaus, extending westward into the Ozarks and Ouachitas, and disjunct in the Driftless Area of Wisconsin. There are estimated to be more than 300 occurrences. Threats include loss and fragmentation of habitat, forest management practices, quarrying, recreation impacts from rock climbing, and extreme drought such as may be exacerbated by climate change.
Range Extent CommentsLobed Spleenwort (Asplenium pinnatifidum) occurs in the eastern United States, in the Appalachians from New Jersey and Pennsylvania south to Georgia and Alabama, becoming more common in the Cumberland and Interior Low Plateaus from West Virginia, southeastern Ohio and Kentucky to southern Illinois and Mississippi, extending westward into the Ozarks and Ouachitas of southern Missouri, Arkansas, and eastern Oklahoma, and disjunct in the Driftless Area of Wisconsin. Range extent was estimated to be 1.3 million square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1992 and 2023 (Flora of North America Editorial Committee 1993, GBIF 2023, iNaturalist 2023, NatureServe 2023, Weakley and Southeastern Flora Team 2023).
Occurrences CommentsBased on NatureServe Network occurrence data, herbarium records, and photo-based observations documented between 1992 and 2023, and anecdotal evidence, there are over 300 occurrences of Lobed Spleenwort, rangewide (GBIF 2023, iNaturalist 2023, NatureServe 2023).
Threat Impact CommentsLand-use conversion, loss and fragmentation of habitat, and forest management practices are low-level threats to this species (Southern Appalachian Species Viability Project 2002), other threats include quarrying, recreation impacts from rock climbing, and extreme drought such as may be exacerbated by climate change (Dodds 2022).