By Fritz Hans Schweingruber
he „Atlas of Woody Plant Stems“ is a com- obviously, it was once very unlikely to hide thoroughly the Tprehensively illustrated booklet with brief, in- huge, immense variability of flora kinds. now we have formative texts. We selected this structure simply because plant attempted, in spite of the fact that, to demonstrate the most ideas and anatomy and morphology can basically be conveyed through positive factors. Many many years of assortment and prepa- designated photos. moreover, a shiny presentation tion supplied the root for this booklet. should still allure a broader public, not just the s- cialist. we are hoping that the mix of anatomy Fritz Schweingruber wish to thank the Swiss and morphology will create curiosity and interest. Federal study Institute WSL, that provided him Amateurs will benefit from the wide variety of images; hospitality after his retirement. The authors thank all readers can be stuck by way of specific chap- the scholars and co-workers that experience, for many years, ters; experts will delve into features and picture- amassed and ready samples, and who helped graphs which could have by no means been offered prior to; with the English translations. due to John Kirby academics may perhaps use the photographs for illustrations in who made the fnal English modifying. sessions with students.
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Extra info for Atlas of Woody Plant Stems: Evolution, Structure, and Environmental Modifications
Picea mariana represents the Pinaceae family. 57 Juniper forest at the timberline in the Kirgisian TienShan Mountains. Juniperus turkestanica represents the Cupressaceae family. 58 Microscopic section of Parana Pine wood (Araucaria angustifolia), Chile. Typically, the resin ducts are missing (left), but there are several rows of bordered pits in alternating position on tracheids (right). 59 Microscopic section of Alligator Juniper wood (Juniperus depeana), Arizona, USA. Typically, resin ducts are missing (left).
It replaces the epidermis in stems and roots, which grow bigger by secondary growth. 1 Longitudinal section of the shoot tip of an Ash twig (Fraxinus excelsior). The apical, primary meristem and the leaf primordia are shown. In the center, behind the growing region, there is the pith, and on either side of the pith the ﬁrst xylem cells can be found. 2 Bud of an Ash (Fraxinus excelsior). 3. 3 Longitudinal section of an adventitious bud on a Walnut twig (Juglans regia). Leaf primordia wrap around the primary meristem.
Characteristic are the very thick cell walls penetrated by openings of simple pits. The lumina are ﬁlled with tannins (red). 17 Small and wide vessels with bordered pits. Red-berried Elder (Sambucus racemosa). 18 Sieve cells of White Bryony (Bryonia dioeca). Top: transversal section. Below: radial section. Characteristic are the net-like sieve plates at the axial ends and sieve areas at the longitudinal sides. 22). 20; see p. 44). Mechanical stress often induces reaction wood: compression wood in conifers (see p.
Atlas of Woody Plant Stems: Evolution, Structure, and Environmental Modifications by Fritz Hans Schweingruber