Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Botany
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 …
Wood Anatomy Of Lamiaceae. A Survey, With Comments On Vascular And Vasicentric Tracheids, Sherwin Carlquist
Wood Anatomy Of Lamiaceae. A Survey, With Comments On Vascular And Vasicentric Tracheids, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Quantitative and qualitative data are presented for 44 collections representing 42 species in 27 genera. Lamiaceae basically have: vessels with simple perforation plates; vessel-to-vessel pitting alternate; imperforate tracheary elements all libriform fibers, fibers commonly septate; axial parenchyma scanty vasicentric; rays Heterogeneous Type IIB. These features ally Lamiaceae closely with Verbenaceae. In addition to the Mesomorphy ratio (based on vessel element dimensions), features that indicate wood xeromorphy in Lamiaceae, in probable increasing order of importance are: presence of indistinct to marked growth rings; presence of helical thickenings in vessels; presence of vasicentric or vascular tracheids; presence of vessel groups averaging three …