. Diseases of economic plants. Plant diseases. Trees and Timber 365 tirely rotten, the wood is soft and spongy and light yellow in color. The pore-bearing sporophores are hoof-shaped, smooth above, and concen- trically ridged and gray. Below they are red-brown. Rot {Forties ap- planatus Wallr.).— The shelving, per- ennial, pore- bear- ing sporophores are very large, woody, and grayish to brown above, and are commonly found on dead wood, as well as on live trees of poplar, beech, oak, birch, maple. Red-brown rot^^^ " (Fomes pinicola Fr.). — The causal fungus is of world- wide distribution
. Diseases of economic plants. Plant diseases. Trees and Timber 365 tirely rotten, the wood is soft and spongy and light yellow in color. The pore-bearing sporophores are hoof-shaped, smooth above, and concen- trically ridged and gray. Below they are red-brown. Rot {Forties ap- planatus Wallr.).— The shelving, per- ennial, pore- bear- ing sporophores are very large, woody, and grayish to brown above, and are commonly found on dead wood, as well as on live trees of poplar, beech, oak, birch, maple. Red-brown rot^^^ " (Fomes pinicola Fr.). — The causal fungus is of world- wide distribution upon conifers, especially spruce, pine, fir, and hemlock. It occurs also upon birches and other deciduous trees. Entrance is made through wounds. The rotted wood is brittle, cracked, and permeated by numerous sheets of mycelium. In early stages of decay the color changes from red-brown to dark-brown, after which small, irregular, scattered white areas appear. The sporophores vary from cm., averaging 10-15 cm., are bracket-shaped and lobed. The young lobes are bright red to pale yellow, old ones dark Fig. 192. — Fomes applanatus upon trunk of dead tree. After 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 Stevens, Frank Lincoln, 1871- [from old catalog]; Hall, John Galentine, 1870- [from old catalog] joint author. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
