Spermacoce ovalifolia, the broadleaf false buttonweed, is a species of plants in the Rubiaceae. It is native to Mexico, Central America, parts of the Caribbean (Cuba, Puerto Rico, Haiti, Trinidad, and the Windward Islands), and South America (Venezuela, Colombia, Ecuador, Peru, Bolivia, Brazil, Paraguay).Kew World Checklist of Selected Plant Families, Spermacoce ovalifoliaHemsley, William Botting. 1881. Biologia Centrali-Americani; or, Contributions to the Knowledge of the Fauna and Flora of Mexico and Central America, Botany 2(7): 59, Spermacoce ovalifolia Martens, Martin & Galeotti, Henri Guillaume. 1844. Bulletin de l'Academie Royale des Sciences et Belles-lettres de Bruxelles 11(1): 129–130, Borreria ovalifolia Watson, Sereno. 1890. Proceedings of the American Academy of Arts and Sciences 25: 152–153, Spermacoce pringlei
Spermacoce ovalifolia is an annual herb about 30 cm tall. Leaves are ovate, up to 4 cm long. flowers are very small, in dense axillary clusters.
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External links photo of herbarium specimen at Missouri Botanical Garden, collected in Jalisco in 1889, isotype of Spermacoce pringlei, synonym of Spermacoce ovalifolia Gardening Europe