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Imperiled (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Apiales
Family: Apiaceae
Subfamily: Apioideae
Tribe: Oenantheae
Genus: Harperella
H. nodosa
Binomial name
Harperella nodosa
Rose (Rose)[4]


  • Harperia Rose, nom. illeg.


  • Carum nodosum (Rose) Koso-Pol.
  • Harperia nodosa Rose, nom. illeg.
  • Ptilimnium nodosum (Rose) Mathias
  • Carum viviparum (Rose) Koso-Pol.
  • Harperella fluviatilis Rose
  • Harperella vivipara Rose
  • Ptilimnium fluviatile (Rose) Mathias
  • Ptilimnium viviparum (Rose) Mathias

Harperella is a monotypic genus of flowering plants in the family Apiaceae. Its only species is Harperella nodosa (synonym Ptilimnium nodosum),[6] known as piedmont mock bishopweed[8] and harperella. It is native to riparian environments in the Southeastern United States, found at sites in West Virginia, Maryland, several Southeastern states such as Alabama and North Carolina, and the Ouachita National Forest in Arkansas and Oklahoma.[9][10][11][12][13] As Ptilimnium nodosum, it was placed on the United States' Endangered Species List in 1988.[14]


The genus was first described by Joseph Nelson Rose in 1905 under the name Harperia. However, this was a later homonym of a genus in the family Restionaceae, and so illegitimate. In 1906, Rose published the replacement name Harperella.[5]


  1. ^ NatureServe (4 August 2023). "Ptilimnium nodosum". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 19 August 2023.
  2. ^ "Harperella (Ptilimnium nodosum)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 19 August 2023.
  3. ^ 53 FR 37978
  4. ^ "Harperella nodosa (Rose) Rose". The International Plant Names Index. Retrieved 2022-12-17.
  5. ^ a b "Harperella Rose". The International Plant Names Index. Retrieved 2022-12-17.
  6. ^ a b "Harperella Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2022-12-17.
  7. ^ "Harperella nodosa (Rose) Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2022-12-17.
  8. ^ USDA, NRCS (n.d.). "Ptilimnium nodosum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 15 October 2015.
  9. ^ Godfrey, R. K. & J. W. Wooten. 1981. Aquatic and Wetland Plants of Southeastern United States Dicotyledons 1–944. Univ. Georgia Press, Athens
  10. ^ Mathias, M. E. 1936. Studies in the Umbelliferae. V. Brittonia 2(3): 239–245
  11. ^ Radford, A. E., H. E. Ahles & C. R. Bell. 1968. Manual of the Vascular Flora of the Carolinas i–lxi, 1–1183. University of North Carolina Press, Chapel Hill.
  12. ^ Feist, M.A.E., S.R. Downie, A.R. Magee & M. Liu. 2012. Revised generic delimitations for Oxypolis and Ptilimnium (Apiaceae) based on leaf morphology, comparative fruit anatomy, and phylogenetic analysis of nuclear rDNA Its and cpDNA "trnQ-trnK" intergenic spacer sequence data. Taxon 61(2): 402-418.
  13. ^ Buthod, A.K. and B.W. Hoagland. 2013. Noteworthy Collections: Oklahoma. Castanea 78(3): 213-215.
  14. ^ Center for Plant Conservation Archived 2015-09-07 at the Wayback Machine

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