Within the depth-psychology corpus, barley functions across several distinct but interlocking registers: as a ritual substance, as a nutritive-psychic metaphor, as a monetary unit, and as a psychedelic vector. Burkert establishes barley’s centrality to Greek sacrificial procedure, where unground barley grains (oulai) were scattered over victim and altar as the foundational inaugural gesture of the rite, a practice linguistically confirmed by Beekes’s etymological analysis of οὐλαί as ‘(unground) barley corns, roasted and sprinkled between the horns of the sacrificial animal.’ Onians presses the nutritive register furthest: Homer’s equation of barley-groats with marrow — αλφιτα, μυελόν ανδρών — reveals an archaic physiology in which grain and vital fluid are homologous, such that to eat barley is to replenish the life-substance stored in bone and marrow. Campbell elevates barley to psychopharmacological significance at Eleusis, drawing on Wasson, Hofmann, and Ruck to argue that ergot-contaminated barley drink was the chemical substrate of initiatory revelation. Seaford treats barley as an economic counter in Babylonian exchange, where it served as both medium and standard of value. The Odyssey passages embed barley within provisioning and sacrificial contexts simultaneously, while Hesiod treats it as an agricultural index of right order. Together, these perspectives place barley at the intersection of body, ritual, economy, and altered consciousness.