Some endoplasmic reticula were sometimes observed in ramiform profiles.
Eizo Maeda, Hiroshi Miyake, Keiichi Tomaru 1999, 'Ultrastructure of Mesophyll Glands Secreting the Aromatic Substances in PatchouliLeaves', Plant Production Sciencehttp://dx.doi.org/10.1626/pps.2.213. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)