Flowers of wild Freesia species and a subset of their diverse floral terpenoids. Terpenoids generated by TPSs from the C15 substrates (E, E) and (Z, Z)-farnesyl diphosphate yield the sesquiterpene (C15) products. Monoterpenes (C10) are generated by TPSs from the C10 geranyl diphosphate (GPP) and neryl diphosphate substrates. The most common and abundant terpenes: limonene, linalool, and myrcene. The terpenes more characteristic in wild Freesia species are: β-caryophyllene, α-terpineol, nerol, and α-selinene. Modified from Bao et al. (2023).