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