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1.The stamen of paulownia tomentosa×P. fortunei is a didynamous one. There are four microsporangia in each young anther.
豫杂一号泡桐(Paulownia tomentosa×P.fortunei)为二强雄蕊,幼嫩花药具四个小孢子囊(花粉囊)。收藏指正
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