Inhibitors in the sarcotesta ofGINKGO BILOBAseeds and their retarding action on embryo growth. — The sarcotesta ofGinkgo bilobaseeds contains some inhibitors which delay or hamper the germination of other cormophytes seeds. This has been proved with seeds ofHordeum vulgareL.,Vicia sativaL., andTriticum vulgareL. germinating in water extracts of ripe sarcotesta at various concentrations.