. Elementary botany. Botany. n6 MORPHOLOG Y. 270. The red algae (Rhodophyceae).—The larger number of the so-called red algae occur in salt water, though a few genera occur in fresh Fig. 119. Portion of plant of fucus showing conceptacles in enlarged ends ; and below the vesicles (Fucus vescicu- losus). Fig. 120. Section of conceptacle of fucus, showing oogonia, and tufts of antheridia. (Lemanea grows only in winter in turbulent water of quite large streams. Batrachospermum grows in rather slow-running water of smaller streams. Both of these inhabit fresh water.) The plants of the group
. Elementary botany. Botany. n6 MORPHOLOG Y. 270. The red algae (Rhodophyceae).—The larger number of the so-called red algae occur in salt water, though a few genera occur in fresh Fig. 119. Portion of plant of fucus showing conceptacles in enlarged ends ; and below the vesicles (Fucus vescicu- losus). Fig. 120. Section of conceptacle of fucus, showing oogonia, and tufts of antheridia. (Lemanea grows only in winter in turbulent water of quite large streams. Batrachospermum grows in rather slow-running water of smaller streams. Both of these inhabit fresh water.) The plants of the group possess chloro- phyll, but it is usually obscured by a reddish or purple pigment. 271. Gracillaria —Gracillaria is one of the marine forms, and one species is illustrated in fig. 126. It measures i5-20cm or more long, and is pro- fusely branched in a palmate manner. The parts of the thallus are more or less flattened. The fruit is a cystocarp, which is characteristic of the rhodo-. 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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