Crataegus oxyacantha

File:Crataegus_sp_Sturm3.jpg as this species, but showing characteristics of leaf, anther, and style number that do not match Linnaeus' original type specimen]]

The name Crataegus oxyacantha L. has been rejected as being of uncertain application, but is sometimes still used.

Taxonomy

Linnaeus introduced the name Crataegus oxyacantha for a species of Northern European hawthorn{{cite book

| last = Linnaeus

| first = Carl

| author-link = Carl Linnaeus

| year = 1753

| title = Species Plantarum

| publisher = Laurentius Salvius

| location =

| edition = 1st

| volume =

| chapter =

| pages =

| oclc =

| lccn =

| language = Latin| title-link = Species Plantarum

}} and the name gradually became used for several similar species, which were assumed to be the same, particularly the Midland hawthorn C. laevigata and the common hawthorn C. monogyna. In 1946, Dandy showed that Linnaeus had actually observed and described a single-styled species similar to the common hawthorn,{{cite journal

| last = Brummitt

| first = Richard Kenneth

| author-link = Richard Kenneth Brummitt

|date=August 1986

| title = Report of the Committee for Spermatophyta: 30

| journal = Taxon

| volume = 35

| issue = 3

| pages = 556–563

| issn = 0040-0262

| doi = 10.2307/1221918

| pmid =

| jstor = 1221918}} and the Midland hawthorn was effectively a later discovery. However, Byatt showed that confusion over the true identity of C. oxyacantha remained,{{cite journal

| last = Byatt

| first = Jean Irene

|date=July 1974

| title = Application of the names Crataegus calycina Peterm. and C. oxyacantha L

| journal = Botanical Journal of the Linnean Society

| volume = 69

| issue = 1

| pages = 15–21

| issn = 0024-4074

| doi = 10.1111/j.1095-8339.1974.tb01610.x

| pmid =

| pmc =

}} and the name was formally rejected as ambiguous by the International Botanical Congress.{{Cite book |year=2018 |editor-last=Turland |editor-first=N.J. |display-editors=etal|title=International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017 |edition=electronic |location=Glashütten |publisher=International Association for Plant Taxonomy |url=http://www.iapt-taxon.org/nomen/main.php |accessdate=2018-06-27 }}.{{rp|Appendix V, Nomina utique rejicienda}} More recently, Christensen concluded{{cite book

| last = Christensen

| first = Knud Ib

| year = 1992

| title = Revision of Crataegus section Crataegus and nothosection Crataeguineae (Rosaceae-Maloideae) in the Old World

| publisher = American Society of Plant Taxonomists

| location = Ann Arbor, Michigan, U.S.A

| series = Systematic Botany Monographs

| volume = 35

| pages = 1–199

| isbn = 978-0-912861-35-7

| oclc = 26173211

| url = https://books.google.com/books?id=vz0lAQAAMAAJ

}} that the species studied by Linnaeus matches C. rhipidophylla Gand., a relatively rare species.

References

oxyacantha