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Variedades (morfos) florales del arbusto Sarothamnus scoparius (retama). Variedad amarilla (A), la más frecuente, y variedades roja (B) y naranja (C), menos frecuentes. Las flechas señalan el patrón de guías de néctar debajo del pétalo principal. Figure 1. Floral morphs of the shrub Sarothamnus scoparius (retama). Yellow morph (A), the more abundant, and red (B) and orange (C) morphs, less abundant. The arrows indicate the pattern of nectar guide in the main petal. 

Variedades (morfos) florales del arbusto Sarothamnus scoparius (retama). Variedad amarilla (A), la más frecuente, y variedades roja (B) y naranja (C), menos frecuentes. Las flechas señalan el patrón de guías de néctar debajo del pétalo principal. Figure 1. Floral morphs of the shrub Sarothamnus scoparius (retama). Yellow morph (A), the more abundant, and red (B) and orange (C) morphs, less abundant. The arrows indicate the pattern of nectar guide in the main petal. 

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The study of the intraspecific variability in the flower color may help us to better understand the role of pollinators as selective agents end their effect on the local abundance of floral morphs. We studied the influence of intraspecific variation of flower color on the floral visitation rate and the fitness of Sarothamnus scoparius, a common exo...

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