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By: Khan, Moin A. - Siddiqui, BadruzzamanType: ArticleIn: Acta Botanica BrasilicaVolume:Series:Issue:Date: 2007-09-01Page Range:Publication Info:Subjects: Alstonia neriifolia Alstonia venenata cambial fusiform initial length cambial ray initials sieve-tube elements vessel elements xylem fibers