Coincya

{{short description|Genus of flowering plants in the cabbage family Brassicaceae}}

{{Automatic taxobox

|image = IsleofMancabbage.jpg

|image_caption = Coincya monensis subsp. monensis

|taxon = Coincya

|authority = Rouy

}}

Coincya is a genus of flowering plant that belongs to the family Brassicaceae. Three species of the plant are endemic to the British Isles, these being Coincya wrightii (Lundy cabbage), Coincya cheiranthos (nokkasinapit) and Coincya monensis, which has two subspecies, C. monensis subsp. monensis (Isle of Man cabbage) and C. monensis subsp. recurvata (star mustard).{{Cite journal |last1=Facey |first1=Paul D. |last2=Lee |first2=Patricia L. M. |last3=Smith |first3=Melvin N. E. |last4=Hipkin |first4=Charles R. |date=2007-09-01 |title=Conservation of genetic diversity in British populations of the diploid endemic Coincya monensis ssp monensis (Isle of Man Cabbage): the risk of hybridisation with the tetraploid alien, Coincya monensis ssp cheiranthos |url=https://doi.org/10.1007/s10592-006-9251-5 |journal=Conservation Genetics |language=en |volume=8 |issue=5 |pages=1029–1042 |doi=10.1007/s10592-006-9251-5 |bibcode=2007ConG....8.1029F |issn=1572-9737|url-access=subscription }} Another four species are endangered and endemic to the south-central Iberian peninsula.{{Cite journal |last1=Copete |first1=Miguel A. |last2=Herranz |first2=José M. |last3=Ferrandis |first3=Pablo |date=2005-01-01 |title=Seed dormancy and germination in threatened Iberian Coincya (Brassicaceae) taxa |url=https://doi.org/10.2980/i1195-6860-12-2-257.1 |journal=Écoscience |volume=12 |issue=2 |pages=257–266 |doi=10.2980/i1195-6860-12-2-257.1 |bibcode=2005Ecosc..12..257C |issn=1195-6860|url-access=subscription }}

The name derives from the French botanist Auguste-Henri de Coincy.

The star mustard, a plant introduced to eight U.S. states is the same species as the Isle of Man cabbage but a different subspecies. It may have been introduced to the U.S. as the Isle of Man cabbage and subsequently evolved through the founder effect and geographic isolation into a new subspecies.