Histochemical, metabolic and ultrastructural changes in leaf patelliform nectaries explain extrafloral nectar synthesis and secretion in Clerodendrum chinense

叶片盘状蜜腺的组织化学、代谢和超微结构变化解释了中国赪桐（Clerodendrum chinense）的花外蜜腺合成和分泌。