. Lectures on the evolution of plants. Botany; Plants. 72 EVOLUTION OF PLANTS to the action of the waves, are comparatively large, and tough and leathery in consistence like the kelps, which they also resemble in the general arrangement of the cells in the thallus. One peculiar family, the so-called Coralline algae, are characterized by the deposition of large amounts of carbonate of lime, which makes them. Fig. 19 (Red Algae). — A, Callithamnipn floccosum, a simple red sea-weed, showing the protoplasmic connections between the cells, and the non- sexual reproductive bodies, tetraspores, sp; B
. Lectures on the evolution of plants. Botany; Plants. 72 EVOLUTION OF PLANTS to the action of the waves, are comparatively large, and tough and leathery in consistence like the kelps, which they also resemble in the general arrangement of the cells in the thallus. One peculiar family, the so-called Coralline algae, are characterized by the deposition of large amounts of carbonate of lime, which makes them. Fig. 19 (Red Algae). — A, Callithamnipn floccosum, a simple red sea-weed, showing the protoplasmic connections between the cells, and the non- sexual reproductive bodies, tetraspores, sp; B, a single tetraspo- rangium with the four contained spores; C, the spore-fruit, or cystocarp of a somewhat more complicated form, Polysiphonia; D, one of the larger red sea-weeds, Gigartina spinosa, reduced about one-half. resemble corals in form, and in their stony hardness. Some of these often grow associated with true corals, and play an important part in the building up of coral reefs. Like the true corals, these corallines have been preserved very perfectly in a fossil condition, and they appear to be quite ancient 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 Campbell, Douglas Houghton, 1859-1953. New York, The Macmillan Co. , London, Macmillan & Co. , Ltd.
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
