The chromosome morphology of 4 lines of tetraploid wheat was studied. No great differences were observed between the karyotypes ofT. araraticumandT. timopheevion one hand andT. dicoccoidesvar.nudiglumisand an accession collected in Turkey and attributed toT. dicoccoideson the other. Therefore, these two last lines can be considered to belong to theTriticum araraticum — timopheevicomplex. Consequently, this complex occupies a distribution area much broader than previously thought.