Abstract: An observation was made on some characteristics of flowers in F₁ generation by the 28 multiple combinations between 30 varieties of Chrysanthemum.The results indicated that red color of flowers was stronger than yellow at genetic， and original color of yellow and white didn’t be long to matroclinal heredity．White matroclinal could produce’vide separating color in F₁ generation．The inflorescence diameter． number of ray florets and tubular florets appeared heterosis in F₁ generation．The hybrid’s mean inflorescence diam eter， the number of ray florets an d tubular florets were 122.%， 128.% and 124.7% of parent’s respectively， and the value of these three characters inclined more slowly， even appeared hybrid weakness except formean infl orescence diameter as the parent’s increased．The heredity of flat plate shape was stronger than 1—3 cycle plate shaped flower．

Key words: Dendranthema grandiflora, Hybridization, Flower character, Heredit