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SEM micrographs of L. petersonii leaves. (A,B) Epidermal surface showing subpolygonal striate cells and scattered paracytic stomata. (C) Leaf transversal section showing two secretory cavities, located on each side of the rib, one close to the upper epidermis and the other one to the lower epidermis. (D) Higher magnification of an oil cavity located close to the lower epidermis of the leaf.
