Wheat
Wheat, like barley, was associated with the Egyptian cult of Osiris.
The death of a grain crop is followed, after a period of stillness, b the re-sowing and germination of the seeds.
Though no corpses have produced new people, headstone masons still employ the ear of wheat as a symbol of rebirth.
Convent bakers use wheat flour to make communion wafers, making it a holy plant, of sorts, fit to grace the grave of a priest.