. Lectures on the evolution of plants. Botany; Plants. 94 EVOLUTION OF PLANTS spore-fruit, which may have a definite character, as in the mushroom, where the " gills" (Fig. 25, A, g^ are of this nature. The spores on germination form a new mycelium, which in time produces Fig. 25 (Basidiomycetes). — A, a cluster of spore-fruits of the common mush- room, arising non-sexually from the mycelium, m, which is buried in the ground; B, a very young mushroom; C, a section of an older one showing the gills, g, upon which the spores are home; D, diagram showing a section of a gi
. Lectures on the evolution of plants. Botany; Plants. 94 EVOLUTION OF PLANTS spore-fruit, which may have a definite character, as in the mushroom, where the " gills" (Fig. 25, A, g^ are of this nature. The spores on germination form a new mycelium, which in time produces Fig. 25 (Basidiomycetes). — A, a cluster of spore-fruits of the common mush- room, arising non-sexually from the mycelium, m, which is buried in the ground; B, a very young mushroom; C, a section of an older one showing the gills, g, upon which the spores are home; D, diagram showing a section of a gill with the spore-bearing " basidia," 6, cover- ing; its surface; £, i, young, ii, mature basidium of a toadstool (Co- prinus), showing the spores borne at the summit; F, spore-fruit of Tre- mella, one of the lower Basidiomycetes; the spores cover the whole surface of the irregular spore-fruit; G, a bird's-nest fungus (Cyathus): the spores are borne inside the "sporangia," sp, within the cup; H, earth-star (Geaster), one of the Gasteromycetes allied to the pufE-balls. (Pigs. A, B, after Warming; C, after Atkinson.) The lowest of the Basidiomycetes show analogies with the rusts (^cidiomycetes), and do not have the basidia restricted to any definite part of the spore-fruit, but they may be produced all over it, as in the soft gelatinous Tremella (Fig. 25, F), whose convoluted soft yellow or orange masses are not uncommon on. 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 Campbell, Douglas Houghton, 1859-1953. New York, London, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade, booksubjectbotany, booksubjectplants
