. The structure and development of mosses and ferns (Archegoniatae). Fig. 166.—A, Transverse section of three synangia of Dancea alata, Xis; B, horizontalsection of a synangium, showing the numerous loculi, X15; C, vertical; D, hori-zontal section of a synangium of Kaulfussia cesculifolia, XiS. (C, D, afterBower.) Archangiopteris. He finds in all of them that the sporogenoustissue of each sporangium (or loculus), can usually be tracedto a single mother-cell, although there may be exceptions to. thisrule. In all cases the tapetum arises from the tissue adjacent tothe archesporium, and not from
. The structure and development of mosses and ferns (Archegoniatae). Fig. 166.—A, Transverse section of three synangia of Dancea alata, Xis; B, horizontalsection of a synangium, showing the numerous loculi, X15; C, vertical; D, hori-zontal section of a synangium of Kaulfussia cesculifolia, XiS. (C, D, afterBower.) Archangiopteris. He finds in all of them that the sporogenoustissue of each sporangium (or loculus), can usually be tracedto a single mother-cell, although there may be exceptions to. thisrule. In all cases the tapetum arises from the tissue adjacent tothe archesporium, and not from the outer cells of the sporog-enous complex. In this respect the Marattiacese resemble morenearly Hehninthostachys or Botrychhim than they do Ophio-glossum. In Dancea and Kaulfussia there is no mechanical tissue rep-resenting an annulus. The dehiscence is accomplished by a 296 MOSSES AND FERNS CHAP. CO.
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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
