The majority of accessions are diploids (2n=24). Other than seed production, there are no easily identifiable differences between diploids and triploids. Gold and yellow farina are diploids, pallid and yellow/green are tetraploids. Tetraploids can be reconstituted from the diploids, for example by somatic fusion. The resulting diploids are then sporulated by transferring to a media containing reduced nitrogen. Only diploids are capable of producing seeds; triploids will produce flowers but not seeds. Diploids do not contain beta-asarone. After parent haploids mate, they produce diploids. Both species are diploids having six sets of homologue chromosomes (2n=12). Under appropriate environmental conditions, diploids sporulate and undergo meiosis. The diploids are limited to southwest Asia, while the tetraploid population has a circumboreal distribution. Diploids are produced by doubling or fusion of gametes after meiosis.