皮刺由植物体的表皮或皮层形成的尖锐突起的部分。皮刺与茎之间没有维管组织相连，易于剥落，剥落面平坦。蔷薇、月季等茎上散生许多皮刺。
misc. skin needling
这是在海南岛唯一蒴果具皮刺的种。
This is the only species in Hainan Island with prickles on the capsule.
皮刺比刺要小了许多：它们是这些植物外层的附属物，看上去像皮肤的表皮，其下还有亚表皮层。
Prickles are smaller than thorns: they are sharp outgrowths of the plant's outer layers, the skin-like epidermis, and the sub-epidermal layer just beneath it.
结论：浅刺法治疗周围性面神经麻痹疗效优于沿皮透穴刺法。
Conclusion The therapeutic effect of shallow acupuncture is better than that of point-through-point acupuncture for peripheral paralysis.
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