Triticum zhukovskyi Menabde & Eritzjan 

Triticum zhukovskyi, or Zhukovsky's wheat, is a hexaploïd wheat, very closely resembling the Triticum timopheevii, a tetraploid variety of wheat. T. zhukovskyi was first observed in Western Georgia in close proximity to Triticum timopheevii and Triticum monococcum and is believed to be an amphiploid arising from the cross of T. timopheevii and T. monococcum (Wikipedia).

An extinct crop plant (after Khoshbakht and Hammer, 2010). The many extinct Triticum species (on farm) clearly show the general tendency, but which is still available in some collections, highlighting the value of the ex situ system. (Karl Hammer, 2011).