The extrafloral nectaries derived from the 4~5 layers initial cells of involucre lobes.
虎刺花外蜜腺起源于總苞裂片頂端表面的4～5層原始細(xì)胞.
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The floral nectaries Trifolium repens L . are located on the base of filaments.
白車軸草花蜜腺位于雄蕊花絲的基部,屬雄蕊蜜腺.
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