Petagnaea

{{Short description|Genus of flowering plants}}

{{Speciesbox

| image = Petagnea gussonei02.jpg

| status = EN

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Gianguzzi, L. |author2=La Mantia, A. |date=2006 |title=Petagnaea gussonei |volume=2006 |page=e.T61616A12523812 |doi=10.2305/IUCN.UK.2006.RLTS.T61616A12523812.en |access-date=17 November 2021}}

| display_parents = 3

| genus = Petagnaea

| parent_authority = Caruel

| species = gussonei

| authority = (Spreng.) Rauschert

| synonyms =

• Petagnia saniculifolia Guss.
• Sison gussonei Spreng.

}}

Petagnaea is a monotypic genus of flowering plants in the family Apiaceae. Its only species is Petagnaea gussonei. It is named after Neapolitan botanist Vincenzo Petagna (1734-1810).{{Cite book |author=Michael G. Pimenov |year=2003 |title=Karyotaxonomical Analysis in the Umbelliferae |publisher=Science Publishers |isbn=978-1-57808-222-3 |page=40}} It is found only in Sicily, in Mediterranean-type shrubby vegetation, and is threatened by habitat loss.