× S. auricularis
|× Sorbopyrus irregularis|
The shipova (× Sorbopyrus irregularis (Münchh.) C.A.Wimm.) is a hybrid of the European pear (Pyrus communis) and the common whitebeam (Sorbus aria). It is a small to medium-sized tree growing to 10–18 m tall (or 4 - 6 m on dwarfing rootstock), with deciduous oval leaves 7–11 cm long and 5–6 cm broad. The fruit is a pome 2.5–3 cm long; it is edible with a sweet, yellowish flesh, which tastes similar to a Nashi pear.
The hybrid, known as the Bollwiller pear, first arose at Bollwiller in Alsace, France, before 1612, and has mostly been propagated by grafting since then; it is nearly sterile, only rarely producing any viable seeds. Two successful seedling propagations have been named as the cultivar 'Bulbiformis' and as the species Pyrus malifolia, but shipova trees are not widely cultivated. Shipova is the only known species in the nothogenus × Sorbopyrus (the hybrid genus of Sorbus and Pyrus)
Other intergeneric hybrids within tribe Maleae that include Sorbus as one of the parents are:
Alternative genus names
- Potter, D.; Eriksson, T.; Evans, R.C.; Oh, S.H.; Smedmark, J.E.E.; Morgan, D.R.; Kerr, M.; Robertson, K.R.; Arsenault, M.P.; Dickinson, T.A.; Campbell, C.S. (2007). Phylogeny and classification of Rosaceae. Plant Systematics and Evolution. 266(1–2): 5–43. [Using the name Spiraeoideae to refer to the subfamily now known as Amygdaloideae]
- "×Sorbopyrus irregularis". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 8 January 2018.
- Wimmer, Clemens Alexander (2014). "The Bollweiler pear × Sorbopyrus irregularis (Münchh.) CAWimm.: History and nomenclature" (PDF).
- "Shipova European Pear". Raintree Nursery. Retrieved 2020-07-03.
- "Shipova Mt. Ash Hybrid Fruit Tree at One Green World". One Green World. Retrieved 2020-07-03.
- Alfred Rehder (1949). "Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere". Arnold Arboretum of Harvard University. p. 260.
- Bean, W. J. (1980). Trees and Shrubs Hardy in the British Isles, eighth edition.
- Wimmer, C.A. (2014). Die Bollweiler Birne × Sorbopyrus irregularis (Münchh.) C.A.Wimm. : Geschichte und Nomenklatur. Zandera 29 (2014), Nr. 2