. The essentials of botany. Botany. 184 FlQ. 105.—Sexual organs of a Cup-fungus (Peziza omphalodes). The two car- Eogones are globular; each as a curved trichogyne. The antherids are curved branches from below the orraduallv takes carpogones. Much magni- ^ •' fled. frn-TTi of of the ends of certain of the filaments of the plant into globular or ovoid cells, the carpo- gones, each having a projection (trichogyne). From below each car- pogone a slender branch grows out, and becomes the antherid (Fig. 106). 340. In the few plants in which it is known fertilization is effected by contact
. The essentials of botany. Botany. 184 FlQ. 105.—Sexual organs of a Cup-fungus (Peziza omphalodes). The two car- Eogones are globular; each as a curved trichogyne. The antherids are curved branches from below the orraduallv takes carpogones. Much magni- ^ •' fled. frn-TTi of of the ends of certain of the filaments of the plant into globular or ovoid cells, the carpo- gones, each having a projection (trichogyne). From below each car- pogone a slender branch grows out, and becomes the antherid (Fig. 106). 340. In the few plants in which it is known fertilization is effected by contact of the antherid with the trichogyne. As a result numerous branches start out from below the carpogone, and growing upward form a dense felted mass which on the size and form of the spore-fruit. Some of the filaments of the spore-fruit become enlarged into sacs in which spores are developed (Fig. 107), while the others {parcqiliyses) make up the sterile or protective tissue. The spore-sacs groiv so that all reach tlie same height, and make up the inner surface of the cup (Fig. 106). 341. While tlic foregoing may be regarded as the typical structure of the plants of this order, it presents several modifications, tho most important of which is that due to the peculiar parasitism occurring in three families which gives rise to the " lichen " structure. These have gener- ally been regarded as constituting a separate order, but it is now known that there are "lichen-forming" plants in widely separated groups. However, since the greatest number of species occurs in this order, they may be studied best here by the beginner. 342. The Lichens are among the most interesting plants of the vegetable kingdom. They are not only often of ex-. 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 Bessey, Ch
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