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Claytosmunda claytoniana

(L.) Metzgar & Rouhan

Interrupted Fern

G5Secure Found in 1 roadless area NatureServe Explorer →
G5SecureGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.158180
Element CodePPOSM01020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumFilicinophyta
ClassFilicopsida
OrderFilicales
FamilyOsmundaceae
GenusClaytosmunda
Synonyms
Osmunda claytonianaL.Osmundastrum claytonianum(L.) Tagawa
Other Common Names
interrupted fern (EN) Osmonde de Clayton (FR)
Concept Reference
Kartesz, 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 Comments
Metzger et al. (2008) show that Osmunda is paraphyletic and transfer this species to the monotopic genus Claytosmunda, which is maintained by Weakley and the Southeastern Flora Team (2024). In contrast, FNA (1993, vol. 2) and Kartesz (1994) recognize Osmunda claytoniana. The generic placement of this taxon is in accordance with the Pteridophyte Phylogeny Group I (2016).
Conservation Status
Rank MethodExpertise without calculation
Review Date2016-05-16
Change Date1984-06-11
Ecology & Habitat
Other Nations (2)
CanadaN5
ProvinceRankNative
ManitobaS2Yes
Nova ScotiaS5Yes
QuebecS5Yes
LabradorS2Yes
OntarioS5Yes
Prince Edward IslandS5Yes
Island of NewfoundlandS4Yes
New BrunswickS5Yes
United StatesNNR
ProvinceRankNative
WisconsinSNRYes
IowaS4Yes
North CarolinaS4Yes
MissouriSNRYes
Rhode IslandSNRYes
MinnesotaSNRYes
VirginiaS5Yes
South CarolinaS1Yes
West VirginiaS5Yes
IndianaSNRYes
MassachusettsSNRYes
MississippiSNANo
TennesseeSNRYes
OhioSNRYes
VermontS5Yes
New HampshireSNRYes
New YorkS5Yes
MaineSNRYes
ArkansasS1Yes
DelawareS4Yes
GeorgiaS3Yes
New JerseyS4Yes
PennsylvaniaS5Yes
LouisianaSNANo
IllinoisS3Yes
MichiganSNRYes
ConnecticutSNRYes
MarylandSNRYes
AlabamaS1Yes
KentuckyS4Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (1)
Pennsylvania (1)
AreaForestAcres
Clarion RiverAllegheny National Forest3,821
References (5)
  1. Flora of North America Editorial Committee (FNA). 1993a. Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.
  2. Kartesz, 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.
  3. Metzgar, J.S., Skog, J.E., Zimmer, E.A. and K.M. Pryer. 2008. The paraphyly of <i>Osmunda </i>is confirmed by phylogenetic analyses of seven plastid loci. Systematic Botany, 33(1): 31-36.
  4. Pteridophyte Phylogeny Group I. 2016. A Community-Derived Classification for Extant Lycophytes and Ferns. Journal of Systematics and Evolution 54(6): 563–603.
  5. Weakley, A.S., and Southeastern Flora Team. 2024. Flora of the southeastern United States. Edition of March 4, 2024. University of North Carolina Herbarium (NCU), North Carolina Botanical Garden, University of North Carolina, Chapel Hill. 2203 pp.