Diplostemonous is a botanical term used to describe a flowering plant with twice the number of stamens as petals. However, if you prefer to use a synonym for diplostemonous to describe such flora, you may consider the term "double-stamened". This word effectively conveys the concept of twice the number of stamens as petals in a concise and straightforward manner. Alternatively, you could use the term "bisexual" to describe diplostemonous plants, as it indicates that the flowers contain both male and female reproductive structures. Both of these synonyms effectively capture the meaning of diplostemonous, providing alternative ways to convey this botanical characteristic.