Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . le length of each side, asin Fig. 58. Ducts of this sort abound in thestems or stalks of Ferns. The markings areoften spiral in their arrangement; as is shownin Fig. 59, by the way the duct tears into aband. Ducts of this and of the foregoing sort,where the markings are thin places, have beennamed by Morren and Lindley Bothrenchyma,meaning pitted tissue. 60. Reticulated, Annular, and Spiral Ducts (Fig. 60-65), on the ot
Introduction to structural and systematic botany, and vegetable physiology, : being a 5th and revedof the Botanical text-book, illustrated with over thirteen hundred woodcuts . le length of each side, asin Fig. 58. Ducts of this sort abound in thestems or stalks of Ferns. The markings areoften spiral in their arrangement; as is shownin Fig. 59, by the way the duct tears into aband. Ducts of this and of the foregoing sort,where the markings are thin places, have beennamed by Morren and Lindley Bothrenchyma,meaning pitted tissue. 60. Reticulated, Annular, and Spiral Ducts (Fig. 60-65), on the other hand (called Trachea, from their resemblance to the windpipe,or rather to the trachete or air-tubes of insects), have been distin-guished by Morren and Lindley under the general name of Trachen-chyma. In these the markings, at least in most cases, are thicker FIG. 56. Fortion of a dotted duct from the Vine, evidently made up of a series of short cells. FIG. 57. Fart of a smaller dotted duct, showing no appearance of such composition. FIG. 58. Scalariform ducts of a Fern, rendered prismatic by mutual pressure. FIG. 59. Similar duct of a Fern, torn into a spiral VASCULAR TISSUE. 47
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1860, booksubjectbotany
