. Fungi; their nature and uses. Fungi. THE SPOKE AND ITS DISSEMINATION. 121 are distributed over the hymenium or gill plates, the surface of which is studded with basidia, each of which normally ter- minates with four short, erect, delicate, thread-like processes, each of which is surmounted by a spore. These spores are colourless or coloured, and it is upon this fact that primary divi- sions in the genus Agaricus are based, inasmuch as colour in the. Fig. 45.—Spores of (a). Agaricus mucidus; (b) Agaricus vaginatus; (c) Agaricus pascuus; (d) Agaricus nidoroaus; (e) Agaricus campeatrU. (Smith.)
. Fungi; their nature and uses. Fungi. THE SPOKE AND ITS DISSEMINATION. 121 are distributed over the hymenium or gill plates, the surface of which is studded with basidia, each of which normally ter- minates with four short, erect, delicate, thread-like processes, each of which is surmounted by a spore. These spores are colourless or coloured, and it is upon this fact that primary divi- sions in the genus Agaricus are based, inasmuch as colour in the. Fig. 45.—Spores of (a). Agaricus mucidus; (b) Agaricus vaginatus; (c) Agaricus pascuus; (d) Agaricus nidoroaus; (e) Agaricus campeatrU. (Smith.) spores appears to be a permanent feature. In white-spored species the spores are white in all the individuals, not mutable as the colour of the pileus, or the corolla in phanerogamic plants. So also with the pink spored, rusty spored, black spored, and others. This may serve to explain *why colour, which is so little relied upon in classification amongst the higher plants, should be intro- duced as an element of classification in one of the largest genera of fungi. There are considerable differences in size and form amongst the spores of the Agaricini, although at first globose; when mature they are globose, oval, oblong, elliptic, fusiform, and either smooth or tuberculated, often maintaining in the different Fig. 46.—Spores of (a) Lactarius blennius; (b) Lactarius fuliginoms; (c) Lactarius quietus, (Smith.) genera or subgenera one particular characteristic, or typical form. It is unnecessary here to particularize all the modifica-. 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 Cooke, M. C. (Mordecai Cubitt), b. 1825; Berkeley, M. J. (Miles Joseph), 1803-1889, ed. New York, D. Appleton and Co.
Size: 2182px × 1145px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1870, bookyear1875
