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Organización del capítulo fructífero y heterocarpia en Bidens pilosa L.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-04)
Bidens pilosa L.. (Compositae) one among the World's worst weeds, produces open globose heads of desmochorous achenes disposed radially around the receptacle. These achenes are more numerous (about 60%) in the inferior ...