. Contributions from the Osborn Botanical Laboratory. Plants. Vegetation of Northern Cape Breton. 337 vanicum are common in neglected pastures, while Salix humilis, Alnns mollis and Spiraea latifolia are frequently prominent. But while Dicksonia and other herbs often develop luxuriantly, and while shrubs may sometimes come to predominate over con- siderable areas, on the whole there is no sharply defined inter- mediate successional stage between grassland and coniferous forest. As a matter of fact, trees are present from the Figure 35.—Reproduction of balsam fir and spruce in abandone
. Contributions from the Osborn Botanical Laboratory. Plants. Vegetation of Northern Cape Breton. 337 vanicum are common in neglected pastures, while Salix humilis, Alnns mollis and Spiraea latifolia are frequently prominent. But while Dicksonia and other herbs often develop luxuriantly, and while shrubs may sometimes come to predominate over con- siderable areas, on the whole there is no sharply defined inter- mediate successional stage between grassland and coniferous forest. As a matter of fact, trees are present from the Figure 35.—Reproduction of balsam fir and spruce in abandoned field, Barrasois. A close examination of almost any grassy field will usually reveal the presence of numerous young seedling coniferous trees (Fig. 35). In the face of repeated mowing these trees will persist for several years and are ready, whenever the opportunity offers, to grow up and to more or less completely occupy the ground. Grazing may check tree reproduction but seldom prohibits it entirely. In one field where sheep are pastured much of the year, the writer counted as many as twelve seedling white spruces to the square yard. The browsing of cattle may check their growth and is responsible for various grotesque tree shapes,. 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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Keywords: ., bookcollectionbiodiversity, bookcollectionnyb, booksubjectplants
