. A handbook of cryptogamic botany. Cryptogams. Fig. 251.—Acetahitlaria mediterraiiea Lmx. (natural sizaj. the walls of which are, when mature, permeated by calcium carbonate. The cap is divided by regular radial projections into a large number of cham- bers of nearly equal size, which are in communication with one another above the insertion of the stalk. The upper part of the thallus perishes at the end of the season, while the lower portion is perennial. After a number of sterile thalli have been produced, a fertile thallus appears, similar in structure to the sterile ones. In the chambers
. A handbook of cryptogamic botany. Cryptogams. Fig. 251.—Acetahitlaria mediterraiiea Lmx. (natural sizaj. the walls of which are, when mature, permeated by calcium carbonate. The cap is divided by regular radial projections into a large number of cham- bers of nearly equal size, which are in communication with one another above the insertion of the stalk. The upper part of the thallus perishes at the end of the season, while the lower portion is perennial. After a number of sterile thalli have been produced, a fertile thallus appears, similar in structure to the sterile ones. In the chambers of the cap of this thallus are produced the zoosporanges, a large number in each chamber, of an ellipsoidal form, and furnished at one end with a lid, which subsequently becomes detached. AMien mature the protoplasm of the sporange breaks up into a number of swarm-spores, Fig. 252.—A. Ttiediterraruui. I, cap (magnified): n, scars of branches; r, rudimentary whorl of branches; a/, ring above the cap ; v, depressed apex (x 4). //, sporange with lid (x 120). ///, the same, show- ing the escape of the swarm-SDOres (x 120). II', conjugation of zoogametes. V, VI, lower part of stem, showing rhizoids, b, VII, plant germinating from a zygosperm. VIII, origin of branches at summit of the stem (x 120). IX, at a later stage (x 90). (After de Bary and Strasburger.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
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