+ Pyrocrataegus
| + Pyrocrataegus | |
|---|---|
Scientific classification  (disputed) | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Rosaceae |
| Tribe: | Maleae |
| Subtribe: | Malinae |
| Genus: | + Pyrocrataegus Rehder[1] |
| Species: | + P. willei |
| Binomial name | |
| + Pyrocrataegus willei | |
| Synonyms[1] | |
| |
+ Pyrocrataegus is an artificial hybrid genus in the family Rosaceae involving the genera Crataegus and Pyrus[1] with an unclear taxonomic status.[3][4] It is mostly believed to be a graft-chimaera,[1][5] but could possibly be a sexual hybrid instead.[6]
Description
[edit]The foliage,[7][6] flowers, and fruits resemble those of the genus Pyrus.[6] The inflorescence is corymbose.[7] The small, red,[6] pyriform fruit is 1.5–3 cm long.[7]
Taxonomy
[edit]It was first described as + Pirocrataegus L.L.Daniel by Lucien Louis Daniel in 1915,[8][5] but this description may be a Nomen nudum.[8] It was described a second time as + Pyrocrataegus Rehder by Alfred Rehder in 1927.[1][9] The correct genus authority is unclear. Some sources credit Lucien Louis Daniel,[5] while others credit Alfred Rehder as the taxon author.[10] It is an artificial hybrid genus involving Crataegus and Pyrus.[1] Some sources treat it as an "unplaced name".[3] Its status is somewhat uncertain: Some treat it as a genus of graft-chimaera,[1][5] some as a nothogenus,[10][4] and some sources simply list it as a genus.[9][3] This intergeneric hybrid between Pyrus and Crataegus is yet to be confirmed by modern taxonomical methods.[4]
Its only species Pyrocrataegus willei L.L. Daniel[2] was described by Lucien Louis Daniel in 1915.[11]
Etymology
[edit]The generic name Pyrocrataegus combines the genera Pyrus and Crataegus.[12][5]
References
[edit]- 1 2 3 4 5 6 7 + Pyrocrataegus Rehder. (n.d.). Plants of the World Online. Retrieved January 14, 2026, from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77220983-1
- 1 2 Pyrocrataegus L.L. Daniel. (n.d.). Interim Register of Marine and Nonmarine Genera (IRMNG). Retrieved January 14, 2026, from https://www.irmng.org/aphia.php?p=taxdetails&id=1043572
- 1 2 3 Pyrocrataegus Rehder. (n.d.-b). WFO Plant List. Retrieved January 14, 2026, from https://wfoplantlist.org/taxon/wfo-4100001186-2025-12
- 1 2 3 Vidaković, A., Šatović, Z., Liber, Z., Jurica, M., & Poljak, I. (2025). Leaf morphological variability of Pyrus spinosa and Crataegus monogyna and their potential hybridization. Acta Botanica Croatica, 84(2), 0-0.
- 1 2 3 4 5 McNeill, J., Shaw, J. M., & Wiersema, J. H. (2016). Proposal to preclude homonymy of generic names with names of intergeneric graft-hybrids (chimaeras). Taxon, 65(5).
- 1 2 3 4 Chevalier, A. (1952). Réflexions sur l'avenir de la culture des arbres fruitiers du groupe des Pomacées et sur les possibilités de leur amélioration. Journal d'agriculture traditionnelle et de botanique appliquée, 32(361), 533-547.
- 1 2 3 Rehder, A. (1927). Manual of cultivated trees and shrubs hardy in North America, exclusive of the subtropical and warmer temperate regions. p. 376. Macmillan Company.
- 1 2 + Pirocrataegus L.L.Daniel. (n.d.). Plants of the World Online. Retrieved January 14, 2026, from https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77220947-1
- 1 2 Pyrocrataegus Rehder. (n.d.). International Plant Names Index. Retrieved January 14, 2026, from https://www.ipni.org/n/77220983-1
- 1 2 ×Pyrocrataegus Rehder in GBIF Secretariat (2023). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2026-01-14.
- ↑ Rehder, Alfred. (1949). Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere (p. 252). Arnold Arboretum of Harvard Univ. https://www.biodiversitylibrary.org/page/39585045
- ↑ GENAUST. (2013). Etymologisches Wörterbuch der botanischen Pflanzennamen. p. 311. Germany: Birkhäuser Basel.