. Elementary botany. Botany. Fig. 150. Coleoch^te soluta : at left branch bearing oogonium ^ooi:)\ antheridia imit): egg in oogonium and surrounded by enveloping threads : at center three antheridia open, and" one spermatozoid : at right sporocarp, mature egg inside sporocarp wall. cell elongates into a slender tube wliich opens at the end to form a channel through which the spermatozoid may pass down to the egg. The egg is formed of the contents of the cell (tig. 159). Several oogonia are farmed on one plant, and in such a plant as C. scutata they are formed in a ring near the margin of
. Elementary botany. Botany. Fig. 150. Coleoch^te soluta : at left branch bearing oogonium ^ooi:)\ antheridia imit): egg in oogonium and surrounded by enveloping threads : at center three antheridia open, and" one spermatozoid : at right sporocarp, mature egg inside sporocarp wall. cell elongates into a slender tube wliich opens at the end to form a channel through which the spermatozoid may pass down to the egg. The egg is formed of the contents of the cell (tig. 159). Several oogonia are farmed on one plant, and in such a plant as C. scutata they are formed in a ring near the margin of the disk. 328. Antheridia.—In C. scutata certain of the cells of the plant divide into four smaller cells, and each of these becomes an antlieri- dium. Ii] C. solula the an-. Fig-i6o. Two sporocarps still surrounded bv tballus Fig iSi. Sporocarp ruptured b \ growth of egg to form ccfl theridia grow out from the Thallus finally decays and mass. Cells of this sporo. sets sporocarp free. p!>\te forming zoospores. end of terminal cells in the , 161. C-scutata. fnrm of short flasks. Some- times four in numlier or less ifig. 159). A single spermatozoid is formed from the contents. It is oval and possesses twij long cilia. After swim-. 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 Atkinson, George Francis, 1854-1918. New York : H. Holt
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