• (a.) Having unequal stamens; having stamens different in number from the petals.
An`i·so·stem'o·nous adjective [ Greek ... unequal + ... warp, thread; ... to stand.] (Botany) Having unequal stamens; having stamens different in number from the petals. 
anisostemonous Referring to a flower whose number of stamens is different from the number of carpels, petals, and sepals.