. Contributions from the Osborn Botanical Laboratory. Plants. 248 Nichols: The vegetation of Connecticut No plants can yet get a foothold in such a place, unless it be a few species that may be able to make their appearance between periods of landslide action; among these plants annuals particu- larly predominate. The perennials that may be found in such places are almost entirely plants which have slid down the bank. Ravines of a similar type may be seen in many places inland, and wherever found the poverty of vegetation on the slopes is the most striking Fig. 4. An embryonic ravi
. Contributions from the Osborn Botanical Laboratory. Plants. 248 Nichols: The vegetation of Connecticut No plants can yet get a foothold in such a place, unless it be a few species that may be able to make their appearance between periods of landslide action; among these plants annuals particu- larly predominate. The perennials that may be found in such places are almost entirely plants which have slid down the bank. Ravines of a similar type may be seen in many places inland, and wherever found the poverty of vegetation on the slopes is the most striking Fig. 4. An embryonic ravine in a clay \Aufi along the western shore of Lake Michigan. Vegetation entirely absent on the unstable clay slopes, except for shrubs and grasses which have slid down from the top. (After Cowles, Physiographic ecology of Chicago and vicinity; photograph furnished by H. C. Cowles.) "As the ravine extends itself inland the conditions outlined above may be always seen about its head, but toward the mouth of the ravine the slopes are less precipitous. Torrents cut down the bed of the ravine until a depth is reached approaching the water level at its mouth. From this time on the slopes become reduced and the ravine widens more than it deepens, by reason of lateral cutting, landslide action, and side gullies. After a time a sufficient stability is reached to permit a considerable growth of 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 Osborn Botanical Laboratory. [New Haven?] Osborn Botanical Laboratory, Yale University
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