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Quercus ×look was thought to be a naturally occurring hybrid between Q. libani and Q. ithaburensis subsp. macrolepis (Hedge & Yaltirik 1994, Menitsky 2005). The Fagales Checklist (Govaerts & Frodin 1998) treats it as a synonym of Q. ithaburensis subsp. ithaburensis, but Michael Avishai, of the Jerusalem Botanical Gardens, considers it to be a good species in its own right and has sent seed from Israel (A. Coombes, pers. comm. 2006). The resultant seedlings are growing in several collections. A tree attributable to this taxon has grown in the Dijon Botanic Garden for over 40 years (F. Picard, pers. comm. via A. Coombes 2008). It was the parent of a tree growing at Arboretum Waasland, Belgium, which in turn was the source of a good young specimen at Thenford House, and another at the Arboretum Günther Diamant, Duisburg, Germany (E. Jablonski, pers. comm. 2006). These are both growing with great vigour, reaching 10–12 m and 14 m respectively by 2006, and producing annual new growth of over 1 m. The deeply but regularly dissected dark green leaves are attractive, and are semi-evergreen.