... 核内共生 intranuclear symbiosis 胚珠内的 intraovular 叶柄内芽 intrapetiolar bud ...
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基于返祖性畸形三胚珠球花的出现及其他形态特征,认为麻黄属胚珠数目减少是该属内物种特化的一个趋势;
Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus.
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