. Botany for agricultural students . Botany. TRUE MOSSES (BRYALES) 419 Most parts of the Moss absorb water and salts directly. Even the leaves are probably able to absorb. The leaves carry on active photosynthesis and supply the carbohydrates. No vascu- lar bundles occur, but in many Mosses there are strands of elon- gated cells which assist in conducting and distributing the foods. The erect habit and the radiate arrangement of the leaves on the stem enable the plant to make the best use of light. Knowing that the leafy green plant is the gametophyte, one knows where to look for the sex organ
. Botany for agricultural students . Botany. TRUE MOSSES (BRYALES) 419 Most parts of the Moss absorb water and salts directly. Even the leaves are probably able to absorb. The leaves carry on active photosynthesis and supply the carbohydrates. No vascu- lar bundles occur, but in many Mosses there are strands of elon- gated cells which assist in conducting and distributing the foods. The erect habit and the radiate arrangement of the leaves on the stem enable the plant to make the best use of light. Knowing that the leafy green plant is the gametophyte, one knows where to look for the sex organs. They are produced on. Fig. 374. — The sex organs of Moss. A, highly magnified vertical sec- tion through the apical region of the stem of a gametophyte, showing arche- gonia (a) with eggs at (e). B, a similar section through a plant bearing antheridia (t). Sperms escaping from an antheridium and one sperm much enlarged are shown at s. the upper end of the stem and are quite well surrounded and hid- den by the upper leaves. If one carefully pulls off the terminal leaves from plants that are in the reproductive condition, the sex organs may be found. They stand erect on the stem tip and are so large that they can be seen with a magnifier of very low power. The antheridia can sometimes be seen without any magnifier. The archegonia are flask-shaped and have very long necks, while the antheridia are club-shaped {Fig. 374). In many Mosses both sex organs occur on the same plant, but in the one shown in the Figure they occur on separate plants. The male. 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 Martin, John N. (John Nathan), b. 1875. New York : John Wiley & Sons, Inc.
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