. A text-book of botany for secondary schools. Botany. FUNGI 147 gome that are important. All of them, at some period of the life-history, produce spores in sacs, and the sacs are usually contained in a spore- fruit. The spore-fruit is of three general kinds: (1) a hollow sphere, completely enclosing the sacs; (2) a flask-like structure with a small open neck; and (3) a cup-like or saucer-like structure which is lined by a layer of sacs. The first kind of spore-fruit is illustrated by the mildews just described. It is of interest to know that truffles are such closed spore-fruits, having be- c
. A text-book of botany for secondary schools. Botany. FUNGI 147 gome that are important. All of them, at some period of the life-history, produce spores in sacs, and the sacs are usually contained in a spore- fruit. The spore-fruit is of three general kinds: (1) a hollow sphere, completely enclosing the sacs; (2) a flask-like structure with a small open neck; and (3) a cup-like or saucer-like structure which is lined by a layer of sacs. The first kind of spore-fruit is illustrated by the mildews just described. It is of interest to know that truffles are such closed spore-fruits, having be- come large and edible. The truffle Fungi are saprophytic, the mycelium being found espe- cially in forests under decaying leaves. The truffles of commerce are obtained chiefly from France and Italy. The sac Fungi with flask-like spore-fruits are illustrated by many forms growing on dead wood or as parasites under the bark of trees and shrubs, and forming upon the surface of the bark black, wart-like growths that include the spore-fruits, in plum- and cherry-trees produc- ing the disease known as black knot. An important member of this group is the fungus that produces the ergot of medi- cine. It is parasitic upon the young heads of rye and. Fig. 136.—Head of rye attacked by ergot fungus, conspicuous growths replacing the grains of rye.—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 Coulter, John Merle, 1851-1928. New York, D. Appleton
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
