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  • Sonoran Desert columnar cacti and the evolution of generalized pollination systems 

    Hamrick, J.L.; Nason, John D.; Holland, J. Nathaniel; Sahley, Catherine T.; Fleming, Theodore H. (Ecological Society of America, 2001)
    We studied variation in flowering phenology, fruit and seed set, and the abundance of the pollinators of four species of night-blooming Sonoran Desert columnar cacti for up to eight years at one site in Mexico and one ...