By Fritz Hans Schweingruber
he „Atlas of Woody Plant Stems“ is a com- clearly, it used to be most unlikely to hide thoroughly the Tprehensively illustrated publication with brief, in- huge, immense variability of flora varieties. we've got formative texts. We selected this structure simply because plant attempted, despite the fact that, to demonstrate the most rules and anatomy and morphology can basically be conveyed by means of gains. Many many years of assortment and prepa- distinctive photos. moreover, a brilliant presentation tion supplied the foundation for this e-book. may still allure a broader public, not just the s- cialist. we are hoping that the mix of anatomy Fritz Schweingruber want to thank the Swiss and morphology will create curiosity and interest. Federal examine Institute WSL, that provided him Amateurs will benefit from the wide variety of images; hospitality after his retirement. The authors thank all readers may be stuck by way of specific chap- the scholars and associates that experience, for many years, ters; experts will delve into facets and picture- amassed and ready samples, and who helped graphs that could have by no means been provided sooner than; with the English translations. because of John Kirby academics could use the photographs for illustrations in who made the fnal English modifying. sessions with students.
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Extra resources for Atlas of Woody Plant Stems: Evolution, Structure, and Environmental Modifications
All the cambial cells are alive, but the nuclei disappeared during the preparation of the slide. ). 33 Live parenchyma cells in mistletoe xylem. The nuclei, which are present in all parenchyma cells, are extremely large. From a morphological point of view, the rays and the longitudinal parenchyma cells are hardly distinguishable. Libriform cells are thick walled and vessel cell walls are perforated by pits. White-berried Mistletoe (Viscum album). 51 THE RISKS OF INSTABILITY: ECCENTRICITY A Enhanced stress also affects the process of cell wall formation.
Silver birch (Betula pendula). Bifacial cambium growth is typical of dicotyledons. The active layer (cambium) is situated between xylem and phloem. 3 SECONDARY GROWTH: ADVANTAGES AND RISKS The primary meristems form vascular bundles, which are continuous from the root tips to the stem tip. They are embedded in parenchymatous tissue. 7). 7 Cross-section of the monocotyledonous Scottish Mountain Asphodel (Toﬁeldia calyculata). The vascular bundles, which are distributed over the entire cross-section, are typical for monocotyledons.
66). Despite morphological similarities in the ﬂowers, the xylem’s anatomy is very heterogeneous. 64). 61 Amborella trichopoda, a representative of the Amborellales. A New Caledonian shrub (photo: Endress and Igersheim 2000). 62 Amborella trichocarpa wood. The wood consists of tracheids and the missing vessels are characteristic of this plant (left). The growth ring boundary in this tropical tree is an expression of a period of dormancy. Relationships to Angiospermae are indicated by large rays (middle).
Atlas of Woody Plant Stems: Evolution, Structure, and Environmental Modifications by Fritz Hans Schweingruber