. A text-book of botany for secondary schools. Botany. 124 A TEXT-BOOK OP BOTANY small, pore-like opening (Fig. 114). On the walls of these cavities oogonia and antheridia are produced. The oogo- nium is peculiar in that it usually produces eight eggs, which are discharged and float free in the water (Fig. 115, A and E). About these eggs the sperms swim in great numbers, often striking against them and setting them rotating (Fig. 115, FsmdH). Finally, a single sperm fuses with an egg and an oospore is formed, which later produces a new Fucus plant. This group of brown Algae, therefore, differs
. A text-book of botany for secondary schools. Botany. 124 A TEXT-BOOK OP BOTANY small, pore-like opening (Fig. 114). On the walls of these cavities oogonia and antheridia are produced. The oogo- nium is peculiar in that it usually produces eight eggs, which are discharged and float free in the water (Fig. 115, A and E). About these eggs the sperms swim in great numbers, often striking against them and setting them rotating (Fig. 115, FsmdH). Finally, a single sperm fuses with an egg and an oospore is formed, which later produces a new Fucus plant. This group of brown Algae, therefore, differs from the other one in producing no swimming spores, and in its dissimilar gametes (eggs and sperms). 4. Red Alg^ (Rhodophycece). 74. General characters.—The red Algae are mostly marine forms, and receive their name from the fact that. Fig. 116.—One of the red Alga;. a red coloring matter completely masks the chlorophyll. As a consequence, the plants are various shades of red,. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
