. Fundamentals of botany. Botany. 3°4 STRUCTURE AND LIFE HISTORIES making it possible for the mycelium to penetrate with ease. This process disintegrates the wood, weakens the tree so that it eventually dies or is easily blown over by the wind, and of course renders the wood of little or no value for timber. The fungus gains admission to the tree by means of the spores falling on some surface freshly exposed by trim- ming the tree, by the accidental breaking of branches, by the "barking" caused by lawnmowers, and in other ways; on account of the disastrous results, all such sur- face
. Fundamentals of botany. Botany. 3°4 STRUCTURE AND LIFE HISTORIES making it possible for the mycelium to penetrate with ease. This process disintegrates the wood, weakens the tree so that it eventually dies or is easily blown over by the wind, and of course renders the wood of little or no value for timber. The fungus gains admission to the tree by means of the spores falling on some surface freshly exposed by trim- ming the tree, by the accidental breaking of branches, by the "barking" caused by lawnmowers, and in other ways; on account of the disastrous results, all such sur- faces should be protected by be- ing painted over as soon as a branch is cut or broken off, or a portion of bark removed. There are many species of wood-de- stroying fungi, and the financial loss they cause to the lumber industry, not to mention the losses of beautiful shade trees in lawns, parks, and streets, is very considerable. MOLDS The filamentous fungi, com- monly known as molds, be- long to various species. The black mold (Mucor mucedo) is common on bread, and the blue mold {Penicillium) (Fig. 224) on decaying fruit and on fruit canned at home. The appearance of the mold indicates that the fruit was not sufficiently sterilized before the cover was screwed down on the fruit jar. In fact, the entire process of canning is a. Fig. 224.—Penicilium glau- cum. h, h3rpha; b, basal cell; st. sterigma; c, spore (conidium).. 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 Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's son & co.
Size: 1202px × 2078px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorgag, bookcentury1900, bookdecade1910, booksubjectbotany
