Abstract. The studies were carried out to find the best forms and varieties of Iris sibirica L. for hybridizing. The longest flower stem produced two forms (A and B) of I. sibirica and varieties: ‘Violet Mere’ and ‘Wisley White’. The form A produced the biggest and the heaviest seeds (weight of 1000 equal 17.2 g), which indicates that this form can be useful in hybridization.

The comparison for future hybridization morphological characteristics of bloomstalk and seed pods of chosen varieties of Iris sibirica L.

Summary

The studies were carried out on the six year old clumps of Iris sibirica in the fields. For investigation were choosen two wild forms of specimen – A and B, and varieties: ‘Dreaming Yellow’, ‘Jamaican Velvet’, ‘Lilienthal’, ‘Towanda Redflare’, ‘Violet Mere’, ‘White Swirl’, ‘Wiltrud Gissel’, ‘Winwood Spring’, ‘Wisary Way’ and ‘Wisley White’. They were self-pollinated. The biometrical comparison of bloomstalks, seed pods and weight of 1000 seeds showed that the longest flower stem produced two forms (A and B) of I. sibirica and varieties: ‘Violet Mere’ and ‘Wisley White’. The form A produced the biggest and the heaviest seeds (weight of 1000 equal 17.22 g). It indicates that this form can be usefull in hybridization.