'polystemonous' originates from New Latin (botanical Latin), specifically the word 'polystemonous', where 'poly-' meant 'many' and 'stemon' meant 'stamen'.

'polystemonous' changed from botanical Latin 'polystemonous', ultimately derived from Ancient Greek elements (poly- + stēmōn) and eventually became the modern English botanical adjective 'polystemonous'.

Initially, it meant 'having many stamens', and over time it has retained the same specialized botanical meaning in modern usage.