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Wood, Bark, And Pith Anatomy Of Old World Species Of Ephedra And Summary For The Genus, Sherwin Carlquist
Wood, Bark, And Pith Anatomy Of Old World Species Of Ephedra And Summary For The Genus, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Quantitative and qualitative data are presented for wood anatomy of 35 collections representing 22 Old World species of Ephedra; the survey of bark and pith anatomy is based on some of these species. Character-state ranges similar to those of the New World species are reported, although more numerous species show vessel absence in latewood. Little diminution in vessel diameter or density occurs in latewood of the eight species that are scandant or sprawling. Helical thickenings or sculpture occur in vessels of about a third of the Old World species, but these thickenings are clearly related to pits, often not …