Read e-book online Anatomy of Flowering Plants: An Introduction to Structure PDF

By Paula J. Rudall

ISBN-10: 0521692458

ISBN-13: 9780521692458

Within the 3rd variation of her winning textbook, Paula Rudall presents a complete but succinct creation to the anatomy of flowering vegetation. completely revised and up-to-date all through, the ebook covers all points of comparative plant constitution and improvement, prepared in a sequence of chapters at the stem, root, leaf, flower, seed and fruit. inner buildings are defined utilizing magnification aids from the easy hand-lens to the electron microscope. a number of references to fresh topical literature are integrated, and new illustrations mirror quite a lot of flowering plant species. The phylogenetic context of plant names has additionally been up-to-date because of more advantageous realizing of the relationships between flowering vegetation. This truly written textual content is perfect for college kids learning quite a lot of classes in botany and plant technological know-how, and is usually an exceptional source for pro and novice horticulturists.

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4 Prunus lusitanica (Rosaceae), transverse section of stem at node, showing connection of petiole vasculature to main vascular cylinder of stem. lg ¼ leaf gap, lt ¼ leaf trace. Scale ¼ 100 mm. Nodes may be unilacunar, trilacunar or multilacunar, depending on the number of leaf gaps in the stem vascular cylinder. This feature is most obvious in stems in which there is otherwise a continuous vascular cylinder, especially where a limited amount of secondary thickening has taken place; as a result, nodal anatomy has been studied far more extensively in woody than herbaceous plants54.

Most commonly, roots possess relatively few xylem poles (usually two, three or four) and the central region is occupied by a group or ring of xylem vessels. g. Iris) possess polyarch roots, and the centre of the root is parenchymatous, sometimes becoming lignified in older roots. 7 Initiation of Lateral and Adventitious Roots Lateral roots are branches of the tap root. They are initiated in relatively mature tissues some distance from the apex, often in acropetal sequence; the most recently-formed lateral roots are usually those nearest to the root apical meristem.

Scale ¼ 100 mm. element walls are helically thickened, and in many Fabaceae the pit apertures are surrounded by numerous warty protuberances, termed vesturing19. Perforated ray cells, an unusual feature of some woods, are ray cells that link two vessel elements and themselves resemble and function as vessel elements, with perforation plates corresponding to those of the adjacent vessel elements. However, like other ray cells, perforated ray cells are formed from ray initials rather than from fusiform initials, like vessel elements.

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Anatomy of Flowering Plants: An Introduction to Structure and Development by Paula J. Rudall

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