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By: Hernández-Vera, Gerardo - Cházaro Basáñez, Miguel de Jesús - Flores-Berrios, ErickaType: ArticleIn: Journal of the Botanical Research Institute of TexasVolume: 1Series:Issue:Date: 2007Page Range: 499--509Publication Info: Fort Worth, Tex Botanical Research Institute of Texas 2007-Subjects: