paper flower noun3 •A plant, Bougainvillea glabra, and its flower head, so called for the papery bracts.prosopis (Syrian mesquite), sugarbeet, camelthorn, pigweed, potato, hemp, physalis, pepper, chrysanthemum, sesame, marigold, paper-flower, Mirabilis, carrot ... — 2000 •A plant, the peach-leaved bellflower, Campanula persicifolia, and its flower. •A plant, Psilostrophe cooperi, and its flower.Between sites, small shrubs (zinnia, Zinnia pumila; paper flower, Psilostrophe cooperi) predominate. — 1990 formspaper flowers