The Djiriji (also known as Baio for the processed sarcotesta seeds; *Macrozamia riedlei* / Zamia Palm) constitutes one of the oldest domesticated carbohydrate sources on earth, utilised by Bibbullmun scientists for tens of millennia.[1] Because raw cycad seeds contain lethal concentrations of the neurotoxic and hepatotoxic azoglycoside **macrozamin** and methylazoxymethanol (MAM), consumption requires an exact, multi-stage biochemical detoxification process.[2]
1. The Anaerobic Fermentation Method
Bibbullmun women held inherited custodial technology for seed detoxification.[3] Cones were harvested during late summer (*Bunuru*). The bright red seeds were separated and submerged into excavated subterranean pits (*kallang*) lined with paperbark (*bibul*) or submerged in flowing freshwater streams.[4]
Over a period of two to four weeks, microbial anaerobic fermentation broke the β-glycosidic bonds, leaching out water-soluble macrozamin toxins while preserving the dense starch and lipid reserves within the kernel.[5] Once the seeds turned bright orange-red and the outer flesh detached freely, they were roasted on wood embers and ground into flour on flat granite metates, yielding nutritious, non-toxic bread.[6]
2. Diplomatic Assemblies & Inter-Subnation Feasting
Because Djiriji stands produced vast seed yields following controlled fire regimes, detoxification harvests underpinned massive inter-subnation ceremonial assemblies (*boonaroo*).[7] Hundreds of delegates from neighboring subnations congregated safely around shared cycad grounds, resolving inter-estate disputes, executing exogamous matrimonial contracts, and performing shared songlines.[8]