Lower leaf epidermis of Cinnamomum under scanning electron microscope displaying stomatal features A, B circular stomata A C. chartophyllum B C. micranthum C, D lip-shaped stomatal C C. migao D C. longepaniculatum E, F globose stomata E C. septentrionale F C. camphora G, H eyelid-shaped stomata G C. tonkinense H C. jensenianum. Scale bars: 10 μm.