. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 372 THE NON-VASCULAR PLANTS to the rocks, and their tough leathery bodies are not injured by the beating of the waves. The rockweeds, which are members of this group, have air bladders, and swollen tips in which the oogonia and antheridia occur. (See Figure 170.) The largest of this group are the kelps, some of which attain a length of several hundred feet. (See Figure 171.) Io- dine is obtained from seaweeds which belong to this group. (4) Rhodophycem. —
. Plant life and plant uses; an elementary textbook, a foundation for the study of agriculture, domestic science or college botany. Botany. 372 THE NON-VASCULAR PLANTS to the rocks, and their tough leathery bodies are not injured by the beating of the waves. The rockweeds, which are members of this group, have air bladders, and swollen tips in which the oogonia and antheridia occur. (See Figure 170.) The largest of this group are the kelps, some of which attain a length of several hundred feet. (See Figure 171.) Io- dine is obtained from seaweeds which belong to this group. (4) Rhodophycem. — The word means red alga. These forms are smaller and more deli- cate than the brown algae. They get their name, like the brown ones, from the pigment which obscures their chlorophyll. These are the seaweeds which are often dried on card- board and taken away as souvenirs of the sea- side. There are violet, purple, and pink ones, as well as red. They often have very graceful branching forms. They do not grow so far north as the brown algae, and are most abun- dant in the tropics. (See Figure 172) Some of the red algae have rather complex methods of sex Fig. 170. — Rockweed (Fucus). A common kind of seaweed. One of the brown alga?. Note the swollen tips in which oogonia and antheridia occur; also the air bladders which add much to the buoyancy of this 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 G. (John Gaylord), b. 1876. New York, American Book Co
Size: 1285px × 1944px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
