• (a.) Having the number of floral organs unequal, as four petals and six stamens.
An`i·som'er·ous adjective [ See Anisomeric .] (Botany) Having the number of floral organs unequal, as four petals and six stamens. 
anisomerous Not having equal, or the same number of, parts, unsymmetrical; especially, in botany, having unequal numbers of parts in different whorls.