Describing plants that are dioecious and also show dimorphism, meaning individuals of each sex have distinctly different physical forms or characteristics.
Combines 'dioecia' (separate sexes) with 'dimorphous' (two forms), from Greek 'di-' (two) and 'morphe' (form), describing organisms with two distinct physical forms.
Some dioeciodimorphous plants like certain ash trees show such extreme sexual dimorphism that male and female individuals look like entirely different species—botanists initially classified them separately until discovering they were actually the same species.
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