花木類の花芽分化に関する研究(第5報) : ボケ.ツツジの花芽分化期並びに花芽の発育経過について

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1. The flower bud formation in Chaenomeles extus-coccine CARR. occurred in the lateral buds, which included several flower buds, of two year old shoots. 2. The initial stages of flower buds in Toyo-nishiki variety were observed from the beginning of September, 1953 to the end of the month in Ka-gawa Prefecture. No flower bud at the stage of initial petal formation was observed in that period. 3. On October 7, the initial formations of petals and stamens were distinguished individually, and they developed normally, pistil formation occurred on October 17. The flowers commenced to bloom on October 27 and continued to the end of March. 4. In azalea, the flower bud formation occurred in the terminal buds, which included 3 or 4 flower buds, of current shoots. 5. The cluster differentiation stages and prediffer-entiation stages of the flower buds were observed on June 20 in Beni-giri variety (R. obtusum), and on July 20 in Oomurasaki variety (R. Oomurasaki). The flower bud differentiation stages in each bud of both varieties observed on July 10 in Beni-giri variety, and on July 30 in Oomurasaki variety. 6. The flower bud development in these varieties. progressed very quickly, and the initial formation of pistils were observed on July 10 in Beni-girl variety, and on August 19 in Oomurasaki variety. But, then they developed very slowly. The initiall formation of pollens and ovules were distinguished on September 18 in the former and on October 18 in the latter. 7. The flowers commenced to bloom on April 10 in Beni-giri, and on April 27 in Oomurasaki variety.
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花木類の花芽分化に関する研究(第5報) : ボケ.ツツジの花芽分化期並びに花芽の発育経過について

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