Having six pistils or female reproductive organs; of or relating to hexagynia in botanical classification.
From Greek 'hex-' (six) and 'gyne' (female) plus the adjectival suffix '-ous' (characterized by). A variant form emphasizing the multiple female reproductive structures.
This adjective form is what you'd use in a botanical description: 'the hexagynous flowers of Hypericum' would describe St. John's Wort, but modern botanists just look at genes instead of counting flower parts now.
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