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Term Definition
Lower septum A wall-like partition of a locule located basally to an articulation (often only seen as a thin line), as seen in longitudinal section, that separates it from an upper septum. Placentation of Lecythis minor. Photo by S. A. Mori. Slide prepared by D. Black.
Lower/upper septum Referring to the combined lengths of the lower and the upper septa as seen in longitudinal sections. The two septae are divided by a septal articulation. The lower septa gives rise to the placenta and the upper septum develops into the columella of the fruit. Placentation of Lecythis persistens subsp. aurantiaca. Photo by C. M. Potascheff
Lower/upper septum articulation A joint between the lower septum and the upper section as seen in a longitudinal section of the ovary. Placentation of Allantoma lineata. Photo by C. Carollo.