6. Corylus × colurnoides C.K.Schneid.

Illustriertes Handbuch der Laubholzkunde 1: 145 (Schneider 1904) [“1906”]. – Original citation: “In Hann. Münden, September 1903, C.K. Schneider”. – Type: not localized. – Note: Hybrid between C. colurna × C. avellana . Recognized by Flora of The USSR (Bobrov 1936a) and World Checklist and Bibliography of Fagales (Govaerts & Frodin 1998) .

C. × fominii Kem.-Nath., Trudy Tbilisskogo Botaniceskogo Instituta 6: 15 (Kemularia-Nathadze 1938). – Type: Georgia, Hortus Botanicus Thbilisiensis (Sect. Silva Georgiae Orient), 16 Aug. 1935, L.M. Kemularia-Nathadze s.n. (syn-: not localized); ibid., 11 Mar. 1936, L.M. Kemularia-Nathadze s.n. (syn-: TBI1024984!, TBI1024985!); ibid., 16 Aug. 1937, L.M. Kemularia-Nathadze s.n. (syn-: not localized).

C. × gudarethica Kem.-Nath., Trudy Tbilisskogo Botaniceskogo Instituta 6: 17 (Kemularia-Nathadze 1938). – Type: Georgia, prov. Tblisi, distr. Aghbulach prope pag. Gudarethi in silva (solo calc.), 28 Aug. 1937, L.M. Kemularia-Nathadze and R. Zagareli s.n. (holo-: TBI1006382!). – Note: although most type material of other names of Kemularia-Nathadze has not been found in TBI (most likely housed in LE), the holotype of C. × gudarethica is localized there. The figure on page 19 is a drawing of the specimen TBI1006382, so this is what the author referred to as C. × gudarethica is supposedly the hybrid of C. iberica ( C. colurna) and C. avellana, while in C. × fominii, the parents (parental sexes) are reversed.