. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 245 Dry rot or house fungus rot [Merulius lacrymans (Wulf.) Schum.]. This fungus is one of the most destructive of timber rots both on ac- count of its action and its frequent oc- currence. It is one of the simplest of the pore fungi, hav- ing only shallow pores on a flat pros- trate fruiting body. It may almost be termed a domesti- cated fungus for it appears almost ex- clusively in the neighborhood of dwellings and' is very seldom seen native in the woods. It has therefore been called by the Ger- m a n s '^h a u s- schwamm
. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 245 Dry rot or house fungus rot [Merulius lacrymans (Wulf.) Schum.]. This fungus is one of the most destructive of timber rots both on ac- count of its action and its frequent oc- currence. It is one of the simplest of the pore fungi, hav- ing only shallow pores on a flat pros- trate fruiting body. It may almost be termed a domesti- cated fungus for it appears almost ex- clusively in the neighborhood of dwellings and' is very seldom seen native in the woods. It has therefore been called by the Ger- m a n s '^h a u s- schwamm" or house fungus. It is also popularly known as the weeping fungus. It attacks chiefly, the soft woods of needle trees but may also destroy oak and other hard woods. This fungus is a typical saprophyte and de- rives its nourishment from the wood which it destroys. When the mycelium has permeated a wood tissue it leaves the latter as a spongy mass of brownish material, a common condition in timbers which are kept in moist Such decayed wood absorbs water readily and retains it so that the wood holds its original size and shape, but when dry the decayed portions shrink, causing cracks which form at right angles to each other,. Fig. 12G.—The fruiting body of the dry-rot fungus (Merulius lacrymans). The under surface covered with shallow pores is shown in the photograph. Much reduced. 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 Freeman, Edward Monroe, 1875-. Saint Paul, Minn.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantdi, bookyear1905
