This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...most common and conspicuous liverworts. The body is a thick Fig. 161.--Marchantia, cross-section of thallus: showing lower epidermis (from which, in other parts of the thallus, rhizoids are developed), two layers of colorless cells (p), and one large air-chamber (a, s, the bounding walls) containing cells with ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...most common and conspicuous liverworts. The body is a thick Fig. 161.--Marchantia, cross-section of thallus: showing lower epidermis (from which, in other parts of the thallus, rhizoids are developed), two layers of colorless cells (p), and one large air-chamber (a, s, the bounding walls) containing cells with chloroplasts (chl) and pierced by a chimney-like air-pore (sp).--After Goebel. thallus that forks repeatedly, giving the appearance of notches of greater or less depth (general habit as in Fig. 160). The central axis of the thallus, or of a branch, ends in the terminal notch, in the bottom of which, therefore, is the growing tip. The upper surface of the Marchantia body is blocked off into small rhombic areas, in the center of each one of which is a minute opening (Fig. 162). A section through this body shows its general structure (Fig. 161). Beginning with the lower side, there is seen first the layer of cells forming the epidermis, from which the rhizoids and certain other appendages arise; above this epidermis there are several layers of colorless cells; above these there is a series of large air-chambers into which project the curious cells containing the chloroplasts; and forming the dome-like roof of each air-chamber is the upper epidermis, pierced by a single air-pore in the center of the roof of each chamber. Each air-pore resembles a little chimney, built up with several tiers of cells. The rhombic areas seen on the surface of the body are the outlines of the air-chambers, and the minute opening in the center of each is the air-pore (Fig. 162). This arrangement of cells containing chloroplasts exposed in airchambers that communicate freely through air-pores suggests the same general mechanism for plant work as that described for leaves, with ...
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Add this copy of A Text-Book of Botany to cart. $36.95, very good condition, Sold by Books Plus, LLC rated 5.0 out of 5 stars, ships from Lexington, SC, UNITED STATES, published 1910 by D. Appleton.
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Add this copy of A Text-Book of Botany-for Secondary Schools to cart. $16.93, very good condition, Sold by Vashon Island Books rated 4.0 out of 5 stars, ships from Vashon, WA, UNITED STATES, published 1905 by D. Appleton.
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b/w Illustration. Very Good. J No Dust Jacket. 8vo-over 7¾"-9¾" In green cloth with gilt and black titling, 8vo, 365pp. Illustrated. (Light shelfwear, rubbing to extremities, ink stamps to endpaper).
