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Erythrina oliviae, a dry-season-flowering tree from Mexico, is primarily pollinated by vertical.The flowers produce large amounts of nectar, which contains a low percentage of sugar and a high number of amino acids.It is possible to recognize two basic patterns in the flower structure of genus Erythrina (Leguminosae): (1) the standard enormously elongated and the keel and wings reduced to minimal size, and (2) the standard ovate or obovate and the keel and wings more or less conspicuously exserted from the calyx.In the first case the flower takes a decidedly tubular shape, and in the second it assumes * We are grateful to M. Sousa for providing information about the Seite peine se Wish to thank M. Campomanes for amino acids analysis of реча L. Herrera who illustrations, and Alfonso Delgado for reading the manuscript.nally we are ghera Grateful to Dr. Peter H. Raven for -and for providing ri dinh and Dr. Rupert Barneby for critically reading the manuscrip °
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Toledo et al. (1979) studied this question.
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