]> sporangium wall endothecium Term used for vascular plants to describe the outermost layer of a sporangium wall that is internal to the exothecium. PO_GIT:356 endothecium of sporangium wall (exact) endotecio de la pared del esporangio (Spanish, exact) 胞子嚢壁内皮 (Japanese, exact) plant_anatomy PO:0030049 A portion of ground tissue (PO:0025059) that is the sub-epidermal layer of a sporangium wall (PO:0025306). rwalls 2011-05-02T09:46:49Z portion of ground tissue sporangium wall exothecium protosporangium endothecium adjacent_to adjacent to part of part of part_of