1. In fact the fruit spot of the pear was one of phellem (the cork cells) formed by cambium of phellem of the periderm. 有些地方由于大量木栓细胞的产生，并突出于果实表面，形成了所谓果点，其实这该认为是表皮上面大小不同的皮孔。
2. Results: The microscopical characteristics such phellem, cortex, phloem and xylem were observed in the transverse section of the stem. 结果：牛耳枫茎横切面主要由木栓层、皮层、韧皮部及木质部等组成；薄层色谱斑点清晰，重现性好。
3. Objective: To study the shape and micro-character of euonymus alatus with phellem wing as drug, it supplied the bases for identifying the euonymus alatus. 目的：对以木栓翅入药的鬼箭羽的形态和显微特征进行研究，为鬼箭羽的鉴别提供依据。
英英解释
n.
1. (botany) outer tissue of bark; a protective layer of dead cells
