1. Key words: microsporogenesis, Liriodendron tulipifera, postmeiotic cytokinesis, sulcus determination, ultrastructure.

2. Seeds have a fleshy coat and color that ranges from red to orange (except Liriodendron).

3. It was certain that introgressin hybridization happened in all 6 experimental populations of Liriodendron, although the orientation and extent of gene introgressin were different among populations.

4. Acer platanoides ‘ Columnare’ / Columnar Norway Maple Street Tree 2” cal 5 Amelanchler x grandiflora ‘Autumn Brilliance’ / Autumn Bril-liance Serviceberry Street Tree Single Stem 2” cal 2 Liriodendron tulipifera ‘Fastigata’ / Tulip Tree GSI Tree 1.5” cal 3

5. The present invention relates to a pharmaceutical composition for treating chronic myeloid leukemia, containing a Liriodendron tulipifera L. bark extract as an active ingredient, and more specifically, to a pharmaceutical composition for treating chronic myeloid leukemia, containing a Liriodendron tulipifera L. bark extract, which causes cell death by a change in mitochondrial membrane potential (MMP) in leukemia cells, and the cleavage of poly(ADP-ribose) polymerase (PARP) and caspase-3 related to a cell death pathway, in order to selectively inhibit the T315I mutant enzyme generated by the mutation of the BCR-ABL fusion gene, which is a gene causing chronic myeloid leukemia.

6. The present invention relates to a pharmaceutical dosage form for treating chronic myeloid leukemia, containing a Liriodendron tulipifera L. bark extract as an active ingredient, and more specifically, to a pharmaceutical dosage form for treating chronic myeloid leukemia, containing a Liriodendron tulipifera L. bark extract, which causes cell death by a change in mitochondrial membrane potential (MMP) in leukemia cells and the cleavage of poly(ADP-ribose) polymerase (PARP) and caspase-3 related to a cell death pathway, in order to selectively inhibit the T315I mutant enzyme generated by the mutation of the BCR-ABL fusion gene, which is a gene causing chronic myeloid leukemia.