A cardinal organ part (PO:0025001) that is the part of a plant ovule (PO:0020003) on the opposite side from a raphe (PO:0020027). [source: POC:curators]
Comment
If you are annotating to this structure for an angiosperm, please add an additional annotation to plant ovary ovule (PO:0025490). If you are annotating to this structure for an gymnosperm, please add an additional annotation to ovuliferous scale ovule (PO:0025491).