Harperella

{{Short description|Genus of flowering plants}}

{{Speciesbox

|name = Harperella

|image = Harperella.jpg

|status = G2 | status_system = TNC|status_ref={{cite web|url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.161024/Ptilimnium_nodosum|title=Ptilimnium nodosum|website=NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer|author=NatureServe|publisher=NatureServe|location=Arlington, Virginia|access-date=19 August 2023|date=4 August 2023}}

|status2=LE|status2_system=ESA

|status2_ref={{cite web|url=https://ecos.fws.gov/ecp/species/3739|title=Harperella (Ptilimnium nodosum)|website=Environmental Conservation Online System|publisher=U.S. Fish & Wildlife Service|access-date=19 August 2023}}{{Federal Register|53|37978}}

|display_parents = 3

|genus = Harperella

|parent_authority = Rose

|species = nodosa

|authority = Rose (Rose)

|synonyms =

Genus:

• Harperia Rose, nom. illeg.

Species:

{{Species list

|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), known as piedmont mock bishopweed{{PLANTS|id=PTNO|taxon=Ptilimnium nodosum|accessdate=15 October 2015}} 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.Godfrey, R. K. & J. W. Wooten. 1981. Aquatic and Wetland Plants of Southeastern United States Dicotyledons 1–944. Univ. Georgia Press, AthensMathias, M. E. 1936. Studies in the Umbelliferae. V. Brittonia 2(3): 239–245Radford, 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.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.Buthod, A.K. and B.W. Hoagland. 2013. Noteworthy Collections: Oklahoma. Castanea 78(3): 213-215. As Ptilimnium nodosum, it was placed on the United States' Endangered Species List in 1988.[http://www.centerforplantconservation.org/collection/cpc_viewprofile.asp?CPCNum=3675 Center for Plant Conservation] {{webarchive|url=https://web.archive.org/web/20150907035942/http://www.centerforplantconservation.org/Collection/CPC_ViewProfile.asp?CPCNum=3675 |date=2015-09-07 }}