Hedlundia hybrida
{{Short description|Hybrid species of tree}}
{{Speciesbox
| image = Sorbus hybrida1.jpg
| image_caption = Foliage and fruit
| status = LC
| status_system = IUCN3.1
| genus = Hedlundia
| species = hybrida
| authority = (L.) Sennikov & Kurtto
| synonyms = {{hidden begin|title = List}}
- Aria hybrida (L.) Beck
- Ariosorbus hybrida (L.) Mezhenskyj
- Crataegus hybrida L.
- Pyrus hybrida (L.) Sm.
- Pyrus semipinnata Roth
- Sorbus aucuparia subsp. hybrida (L.) Bonnier & Layens
- Sorbus aucuparia var. hybrida (L.) Pers.
- Sorbus hybrida (L.) L.
- Sorbus semipinnata Hedl.
- Sorbus semipinnata eusemipinnata Kárpáti
- Aria pinnatifida (Hook.) Lavallée
- Azarolus pinnatifida Borkh.
- Crataegus aria var. fennica L.
- Crataegus fennica Kalm
- Crataegus fennica kalmii L.
- Hahnia pinnatifida Medik.
- Lazarolus pinnatifida Borkh.
- Pyrus aria subsp. fennica (Kalm) Syme
- Pyrus aria var. pinnatifida Hook.
- Pyrus auriculata (Pers.) DC.
- Pyrus fennica (Kalm) Bab.
- Pyrus pinnatifida Ehrh.
- Pyrus pinnatifida var. fastigiata Bean
- Pyrus pinnatifidia Borkh.
- Pyrus scandica var. fennica (Kalm) Duthie
- Pyrus scandica var. pinnatifida Duthie
- Sorbus auricula Dippel
- Sorbus auriculata Pers.
- Sorbus fennica (Kalm) Fr.
- Sorbus hybrida f. fastigiata (Bean) Rehder
- Sorbus hybrida var. laciniata Lavallée
- Sorbus hybrida var. pinnatifida Lavallée
- Sorbus hybrida var. superaucuparia Zabel
- Sorbus pinnatifida Hartig
{{hidden end}}
}}
Hedlundia hybrida (formerly Sorbus hybrida), the Swedish service-tree,{{BSBI 2007 |access-date=2014-10-17}} Finnish whitebeam, or oakleaf mountain ash,{{PLANTS|id=SOHY3|taxon=Sorbus hybrida|accessdate=24 November 2015}} is a species of whitebeam{{Cite web |title=Hedlundia hybrida (L.) Sennikov & Kurtto {{!}} Plants of the World Online {{!}} Kew Science |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77164914-1 |access-date=2023-09-23 |website=Plants of the World Online |language=en}} native to Norway, eastern Sweden, south-western Finland, and locally in Latvia.{{cite book|author=Rushforth, K. |year=1999|title=Trees of Britain and Europe|publisher=Collins |isbn=0-00-220013-9}}{{cite web|website=Den Virtuella Floran|url=http://linnaeus.nrm.se/flora/di/rosa/sorbu/sorbhyb.html |title=Sorbus hybrida|lang=sv}}{{cite book|author=Vedel, H.|author2= Lange, J. |year=1960|title=Trees and Bushes in Wood and Hedgerow|publisher=Metheun & Co. Ltd.|location=London}}
Description
Hedlundia hybrida is a medium-sized deciduous tree growing to {{cvt|10|–|15|m}} tall with a stout trunk up to {{cvt|60|cm}} in diameter, and grey bark. The crown is columnar or conic in young trees, becoming rounded with age, with branches angled upwards. The leaves are green above, and densely hairy with white hairs beneath. {{cvt|7|-|12|cm}} long and {{cvt|5|-|8|cm}} broad, the leaves are lobed, with six to nine oval lobes on each side of the leaf. These lobes are broadest near the base with the two basal pairs of lobes cut right to the midrib as separate leaflets, rounded at the apex, with finely serrated margins. The autumn colour is dull rusty brown. The flowers are {{cvt|20|mm}} in diameter, with five white petals and 20 yellowish-white stamens; they are produced in corymbs {{cvt|6|-|11|cm}} in diameter in late spring. The fruit is a globose pome {{cvt|7|-|12|mm}} in diameter, bright red, maturing in mid-autumn. The fruit is succulent, and eaten by thrushes and waxwings, which disperse the seeds.
Taxonomy
It is a tetraploid species of hybrid origin between the European rowan (Sorbus aucuparia) and the Swedish whitebeam (Scandosorbus intermedia), the latter being a tetraploid triple hybrid between S. aucuparia, the wild service tree (Torminalis glaberrima), and the common whitebeam (Aria edulis) or one of its close relatives.{{cite journal |author1=Nelson-Jones, E.B. |author2=Briggs, D. |author3=Smith, A.G. |year=2002 |title=The origin of intermediate species of the genus Sorbus |journal=Theoretical and Applied Genetics |volume=105 |issue=6–7 |pages=953–963 |doi=10.1007/s00122-002-0957-6|pmid=12582921 |s2cid=21448997 }}{{cite journal |author1=Chester, M. |author2=Cowan, R.S. |author3=Fay, M.F. |author4=Rich, T.C.G. |year=2007 |title=Parentage of endemic Sorbus L. (Rosaceae) species in the British Isles: evidence from plastid DNA |journal=Botanical Journal of the Linnean Society |volume=154 |issue=3 |pages=291–304 |doi=10.1111/j.1095-8339.2007.00669.x|doi-access=free }} S. intermedia differs from H. hybrida in having the leaves less deeply lobed with no separate leaflets. Closely related Hedlundia meinichii is a triploid or tetraploid species of hybrid origin between H. hybrida and S. aucuparia{{cite journal |author1=Bolstad, A. |author2=Salvesen, P. |name-list-style=amp |year=1999 |title=Biosystematic studies of Sorbus meinichii (Rosaceae) at Moster, S. Norway |journal=Nordic Journal of Botany |volume=19 |issue=5 |pages=547–559 |doi=10.1111/j.1756-1051.1999.tb01138.x|bibcode=1999NorJB..19..547B }}{{cite journal |author=Liljefors, A. |year=1953 |title=Studies on propagation, embryology, and pollination in Sorbus |journal=Acta Horti Bergiani |volume=16 |pages=277–329}} and differs in having the basal four to six pairs of lobes cut right to the midrib as separate leaflets. All three polyploid species are apomictic species which breed true without pollination.
Cultivation
Hedlundia hybrida is grown as an ornamental tree in northern Europe, and is locally naturalised in the British Isles. The cultivar 'Gibbsii' has gained the Royal Horticultural Society's Award of Garden Merit.{{cite web|title=RHS Plant Selector - Sorbus × hybrida 'Gibbsii'|url=https://www.rhs.org.uk/Plants/98770/Sorbus-hybrida-L-Gibbsii/Details | access-date = 5 March 2021}}{{cite web | url = https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf | title = AGM Plants - Ornamental | date = July 2017 | page = 98 | publisher = Royal Horticultural Society | accessdate = 15 November 2018}}
References
{{Reflist}}
{{Taxonbar|from1=Q41202362|from2=Q2532563}}
{{DEFAULTSORT:Hedlundia hybrida}}