Of, relating to, or belonging to the Cytinaceae family of parasitic plants.
From Cytinaceae + Latin '-eous' (relating to). The adjectival form of the botanical family name, used to describe plants with characteristics of that family.
When botanists want to say something belongs to the parasitic plant family Cytinaceae, they use this adjective—it's like saying 'that flower is a member of the vampire plant club!' It tells other scientists exactly what kind of nutritional lifestyle the plant has.
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