表皮可分二层：上表皮和内表皮。
叶上表皮细胞常呈乳突状。
正对主脉的上表皮凹陷处均有泡状细胞。
The bulliform cells were situated in groove of upper epidermis facing the main vein.
叶上表皮有盐腺；
叶片上表皮、栅状组织和全叶均较薄，叶质柔嫩，茶叶产量平均提高8％左右；
The upper epidermis, palisade tissues and leaves are all thinner, so the leaves are more tender, and its yield is 8% higher;
同一叶片其下表皮气孔密度大于上表皮，试管苗与土培苗两者叶片下表皮气孔密度差异不显著。
Stomata densities of same type leaf under epidermal are higher than upper epidermal, but were not significantly different between test-tube seedling and land seedling.
同一叶片其下表皮气孔密度大于上表皮，试管苗与土培苗两者叶片下表皮气孔密度差异不显著。
Stomata densities of same type leaf under epidermal are higher than upper epidermal, but were not significantly different between test-tube seedling and land seedling.
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